Q2 law-week-5-6 physical science-validated-converted

Q2 Week 5 (Learning Activity Worksheet) Page 1 of 8
Target Competency: Explain various light phenomena such as: (a) your reflection on the concave and convex
sides of a spoon looks different, (b) mirages, (c) light from a red laser passes more easily though red cellophane than
green cellophane, (d) clothing of certain colors appear different in artificial light and in sunlight, (e) haloes, sundogs,
primary rainbows, secondary rainbows, and supernumerary bows, (f) why clouds are usually white and rainclouds
dark, (g) why the sky is blue and sunsets are reddish
(S11/12PS-IVh-66)
Republic of the Philippines
Department ofEducation
National Capital Region Schools
Division Office of Las Piñas City
Learning Activity Worksheets (LAW)
Physical Science
Grade 12
Name: ___ _ Date: _ Rating/Score _
Various Light Phenomena & Discovery of Radio Waves
Activity 1: Multiple Choice
Direction: Choose the letter of the correct answer in each item and encircle the letter of
the correct answer.
1. What do you call an atmospheric phenomenon where a rainbow-colored splash
appearing on the left or right of the sun?
A. Mirage
B. Sundogs
C. Haloes
D. Rainbow
2. Which of the following is the term used for the rings and arcs of light that appear in the
sky?
A. Mirage
B. Sundogs
C. Haloes
D. Rainbow
3. Which of the following is the image reflection formed in front of the spoon?
A. virtual and inverted image
B. virtual and erect image
C. erect and smaller image
D. erect and bigger image
4. Which of the following is the image reflection formed at the back of the spoon?
A. virtual and inverted image
B. virtual and erect image
C. erect and smaller image
D. erect and bigger image
5. What is the term used that are caused by the reflection and refraction of light in water
droplets that lead the spectrum of light appearing in the sky?
A. Light absorption
B. Rainbows
C. Sundogs
D. Mirage
6. The pigment in the sheet of paper can absorb yellow, green, blue, indigo, and violet.
When illuminated with white light, what color(s) of light are reflected and what color the
paper will appear to an observer?
A. Red-orange
B. Bluish-violet
C. Blue-green
D. Black
7. The pigment in the sheet of paper is capable of absorbing orange, yellow, green, blue,

(S11/12PS-IVh-66)
indigo, and violet. When illuminated with white light, what color(s) of light are reflected
and what color the paper will appear to an observer?
A. Red
B. White
C. Black
D. Violet

(S11/12PS-IVh-66)
8. The pigment in the sheet of paper can absorb red, orange, yellow, blue, indigo, and
violet. When illuminated with white light, what color(s) of light are reflected and what color
the paper will appear to an observer?
A. White
B. Green
C. Red
D. Black
9. The pigment in the sheet of paper can absorb red, orange, yellow, green, blue, indigo,
and violet. When illuminated with white light, what color(s) of light are reflected and what
color the paper will appear to an observer?
A. White
B. Green
C. Red
D. Black
10. The pigment in the sheet of paper can absorb red. What color(s) of
light are reflected and what color the paper will appear to an observer?
A. Red
B. Black
C. Greenish-blue
D. Reddish-orange
11. The pigment in the sheet of paper can absorb red, orange, yellow,
indigo, and violet. What color(s) of light are reflected and what color the
A. Red
B. Black
C. Greenish-blue
D. Reddish-orange
12. The pigment in the sheet of paper can absorb re, orange, yellow,
indigo, and violet. What color(s) of light are reflected and what color the
A. Red
B. Black
C. Greenish-blue
D. Reddish-orange
https://www.physicsclassroo
m.com/class/light/Lesson-
2/Light-Absorption,-
Reflection,-and-Transmission
13. These are rainbows bordered by narrow colored bows (green, violet or orange) due
to interference of light waves.
A. Reflecting bows
B. Primary rainbows
C. Secondary rainbows
D. Supernumerary rainbows
14. These are rainbows that appears outside of a primary rainbow.
A. Reflecting bows
B. Primary rainbows
C. Secondary rainbows
D. Supernumerary rainbows
15. Why is the sky blue?
A. Mie scattering is responsible is for the blueness of the clear sky.
B. Rayleigh scattering is responsible is for the blueness of the clear sky.
C. The sky is blue because the ocean is blue, and it reflects its blue color on to the

(S11/12PS-IVh-66)
earth's atmosphere.
D. This is because the blue light from the sun reflects off some dust particles in the
air in the earth's atmosphere.

(S11/12PS-IVh-66)
Activity 2: TRUE / FALSE
Direction: Write T if the statement is correct and F if it is incorrect.
T 1. Haloes are phenomena that are due to the refraction of light that passes through
the crystals, or the reflection of light from crystal faces, or a combination of both effects.
T 2. Rayleigh scattering refers to the scattering of light by particles that are very small
in relation to the wavelength of the light, and in which the intensity of the scattered light
varies inversely with the fourth power of the wavelength
T 3. Ice crystals can be found high up in the sky all around the world, at a specific
time of the year.
T 4. White light disperses into its component colors when moving from one medium
into another such as from air into a prism or water.
F 5. Light from the Moon also creates glowing spots on both sides of the Moon, called
moon dogs.
F 6. The blue color of the sky is caused by the Mie scattering of sunlight off the
molecules of the atmosphere.
T 7. The part of a sundog closest to the Sun tends to be red in color, while the areas
further away from the Sun generally appear blue or green.
T 8. Atmospheric optical phenomena are visual events that take place in Earth’s
atmosphere because of light reflection, refraction, and diffraction by solid particles,
liquids droplets, and other materials present in the atmosphere.
T 9. Mie scattering is elastic scattered light of particles that have a diameter like or
larger than the wavelength of the incident light.
F 10. Rayleigh scattering is not strongly wavelength dependent and produces the
almost white glare around the sun when a lot of particulate material is present in the
air.
Activity 3: REARRANGE!
Direction: Below are stages of a rainbow formation, arrange the jumbled stages according
to the proper position during rainbow formation. Write the rearranged stages in the
appropriate space provided.
1. When light exists the water-air interface at Point B, it is again refracted and
dispersed.
2. Upon hitting the back surface of the droplet, light is reflected internally, obeying the
laws of reflection.
3. On entering a water droplet at Point A; part of light is refracted. The water droplet
acts like a mini prism and disperses light.
RAINBOWS
Upon hitting
the back
surface of
the droplet,
light is
reflected
internally,
obeying the
laws of
reflection.
On entering
a water
droplet at
Point A; part
of light is
refracted.
The water
droplet acts
like a mini
prism and
disperses
light.
When light
exists the
water-air
interface at
Point B, it is
again
refracted
and
dispersed.

Activity 4: Illustrating Scattering!
Direction: Using the illustration below of the conversation of Trisha and Amanda, write
your brief explanation on the conversation bubbles.
Activity 6: TIME TO DRAW & LABEL!
Direction: Draw the Hertz’ apparatus for producing and detecting radio waves and write
its parts in the space provided.
Activity 6: EXPLAIN!
Direction: Briefly explain the importance of discovering radio waves. You may cite at least
two (2) applications in our daily lives.
Radio waves do more than just bring music to your radio. They also carry signals for your television and
cellular phones. The antennae on your television set receive the signal, in the form of electromagnetic
waves, that is broadcasted from the television station. It is displayed on your television screen. They are
used in standard broadcast radio and television, shortwave radio, navigation and air-traffic control, cellular
telephony, and even remote-controlled toys.
Clouds are white because light from the Sun is white. ... But in a cloud,
sunlight is scattered by much larger water droplets.These scatter all
colours almost equally meaning thatthe sunlightcontinues to remain white
and so making the clouds appear white against the background of the blue
sky.
They are gray because of their
thickness or height. ... A cloud gets
thicker as it gathers more water
droplets and ice crystals. The thicker
a cloud gets, the less light can pass
through it.

Target Competency: Describe how Hertz produced radio pulses
(S11/12PS-IVi-68)

Target Competency: Explain how special relativity resolved the conflict between Newtonian
mechanics and Maxwell’s electromagnetic theory. (S11/12PS-IVi-j-69)
Republic of the Philippines
Department ofEducation
National Capital Region Schools
Division Office of Las Piñas City
Learning Activity Worksheets (LAW)
Physical Science
Grade 12
Name: _ Date: _ Rating/Score _
NEWTONIAN MECHANICS
Activity 1: Name Me!
Directions: Write the correct term being asked in each statement by choosing the
correct answer from the word bank. (5 pts.)
1. The theory of special relativity tells that the speed of light is constant in all
frames of reference.
2. The theory of general relativity deals with inertial frames of
reference relative to one another.
3. The speed of light is equivalent to 3.0x108 m/s.
4. The theory of general relativity deals with accelerated frames of
reference relative to one another.
5. The first radio waves were invented by Hertz which Einstein proved
special
Activity 2. Real-life Relativity Theory
Direction: Analyze the given examples / situations below and explain how
relativity is expressed in real-life situation/s.
1. You may be asking why we need to study relativity and its importance to our daily life.
For this activity, cite two examples on how relativity is applied and how is it used? You
may be asking why we need to study relativity and its importance to our daily life. For this
activity, cite two examples on how relativity is applied and how is it used?
2. GPS navigation allows us to follow specifically unknown directions or recover lost
vehicles. For your car to function as accurately as it does, satellites must take
relativistic effects into account. How does GPS work in relation to Einstein’s
relativity? GPS accounts for relativity by electronically adjusting the rates of the
satellite clocks, and by building mathematical corrections into the computer
chips which solve for the user's location.
Hertz
constant
special
general relativity
3.0x108 m/s

Target Competency: Explain how special relativity resolved the conflict between Newtonian
mechanics and Maxwell’s electromagnetic theory. (S11/12PS-IVi-j-69)
Activity 3: Choose Me!
Directions: Choose the correct answer from each number by writing the letter of your choice.
A 1. Which of the following describes Einstein’s two postulates of special
relativity?
a. constant speed of light c. time dilation
b. principle of relativity d. hertz
A 2. What theory deals with inertial frames of reference backed up by
principle of relativity and constancy of speed of light?
a. electromagnetic theory c. general relativity
b. Newtonian mechanics d. special relativity
B 3. Which of the following shows the conflict between Newtonian
mechanics and Maxwell’s electromagnetic theory?
a. the edge of the moon c. distance of light from reference frame
b. speed of light d. all of them
A 4. Which of the following choices resolves the conflict about Newtonian speed of light
versus Einstein’s speed of light?
a. special relativity c. nuclear physics
b. electromagnetic theory d. quantum gravity
C 5. Which of the following did not result from special relativity?
a. blackhole c. length contraction
b. time dilation d. mass-energy equivalence
Activity 4: Newton and Einstein’s Postulate
Directions: Read the paragraph carefully and answer the guide question below.
The second postulate states that for all reference frames, the speed of light is the
same no matter what their relative speed is clearly tells that Maxwell’s idea is correctbut
does mean Newtonian mechanics is wrong? Not totally, but the postulates of Einstein tell
us that Newtonian mechanics has limitations in terms of its application. If we consider
moving objects with speed very small compared to the speed of light, Newtonian
mechanics applies like the speeds of a flying ball and running car but if we consider
speeds that is close to the speed of light a new concept must be included in order to
supply the limit of Newtonian mechanics and that is the Lorentz transformation the
counterpart of the Galilean transformation of the Newtonian mechanics.
How did Einstein solve the conflict between Newtonian mechanics and Maxwell’s
electromagnetic theory? Maxwell's theory is in fact in contradiction with Newtonian
mechanics, and in trying to find the resolution to this conflict, Einstein was lead to his
theory of special relativity. Maxwell's equations withstood the conflict, but it was
Newtonian mechanics that were corrected by relativistic mechanics

Target Competency: Explain the consequences of the postulates of Special Relativity (e.g.
relativity of simultaneity, time dilation, length contraction, mass-energy equivalence, and cosmic
speed limit). (S11/12PS-IVi-j-70)
Activity 5: Unscramble Me!
Directions: Unscramble the letters below to reveal the correct term and answer the
guide questions.
1. LACSSIALC – CLASSICAL
It is also known as Newtonian Mechanics.
2. LLXAMEW SMAJE – MAXWELL JAMES
He implies that the speed of light is a constant value.
3. NEISTEIN - EINSTEIN
He presented his theory on special relativity.
4. CALPSEI - SACLPSE
It is the theory presented by Einstein resolving the conflict between Newton
and Maxwell.
5. ZTREH - HERTZ
He proved that electric and magnetic fields spread as waves.
Activity 6: Time Dilation Animation
Let us think of it this way; “moving clocks tick slow” - What does this mean?
● Take a spaceship flying to Alpha Centauri (the sun’s nearest neighboring
star) at half the speed of light, as measured by observers on Earth.
● When the astronauts look at their clocks on their spaceship, they see time
ticking by normally: they share the same inertial frame: the spaceship.
● When the observers back on Earth look at their clocks on Earth, they also
see time ticking normally: The Earth is their inertial frame.
● However, say that every time the clocks on the spaceship tick, the
spaceship sends out a light pulse back to earth.
● The observers on the Earth receive the pulses arriving every 1.15 ticks of
them clocks on Earth! i.e. the astronauts see the pulses emitted every
second but observers receive them every 1.15s.
Guide Questions:
1. Describe time dilation. How is it related to the second postulate of special
relativity? Time dilation is a physical process whereby the passing of
time slows down. Einstein's postulates of special relativity result in time
dilation due to the fact that the speed of light is constant and occurs
when both event and observer are in inertial frames of reference
2. How did Einstein explained his theory of special relativity concerning problems
that involve frames of reference moving? Special relativity is an explanation of
how speed affects mass, time and space. The theory includes a way for the
speed of light to define the relationship between energy and matter small
amounts of mass (m) can be interchangeable with enormous amounts of
energy (E), as defined by the classic equation E = mc^2.

Activity 7: Mass-Energy Equivalence
Directions: Analyze the formula and answer the question below.
https://www.kissclipart.com/pie-mc2-clipart-albert-einstein-theory-of-relativi-fzg77u/
1. Explain the consequence of mass and energy if the body is based on the
formula presented above. What happens to the energy if the body is in
motion? Mass-energy equivalence states that mass is concentrated
energy. In his theory of special relativity Einstein formulated the equation
E=mc^2. There is a tremendous amount of energy in mass. A 20g marble
contains as much energy as a 500 kiloton hydrogen bomb, but this energy
is very difficult to release.
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
2. As predicted by special relativity why do lengths observed from the stationary
reference frame look shorter than ones observed from within a reference
frame moving relative to it. An observer at rest relative to the moving object
would observe the moving object to be shorter in length. The object is
actually contracted in length as seen from the stationary reference frame.
The amount of contraction of the object is dependent upon the object's
speed relative to the observer.
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
Activity 8: Length Contraction
Directions: The following thought experiment is a useful
introduction to the idea of length contraction predicted by
the special theory of relativity.
Think of a train and a bridge. At either end of the
bridge there is a light and the light are controlled by a
switch that operates between the track and the train.
When the front of the train reaches the far side of the
bridge the switch closes and the light there comes on.
When the back of the train reaches the near side of the
bridge the switch closes and so that light switches on.
An observer views the train from the center of a path
beneath the bridge.
Describe what the observer sees if the train is the

same length as the bridge? What happens to the
lights? Why? (Figure 1a). If the train is the same length
as the bridge the two lights come on together (Figure
1(a)). Of course the time difference between the observer
in the train receiving the light beams from the two lamps
is insignificant at low speeds but this becomes larger as
the speed of the train approaches that of light.
Describe what the observer sees if the train is shorter than the
bridge, what can he observe from the lights? Why? (Figure 1b).
When an object moves at a very high speed relative to an observer, its
measured length in the direction of motion is contracted. For moving
objects, space as well as time undergoes changes. The observable
shortening of objects moving at speeds approaching the speed of light
is length contraction.
Describe what the observer sees if the train is longer than the bridge,
what can he observe happening to the lights? Why? (Figure 1(c).
Observers between B and C would observe lengthening of the light waves
that are along their line of sight.
https://www.schoolphysics.co.uk/age16-19/Relativity/text/Length_contraction/index.html

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