Light

2. OBJECTIVES:
Identify The Source Of Light.
Give The Importance Of Light And Its
Use.
Perform An Activity That Shows How
Light Travels, Reflect And Refraction.

4. compression
to press or squeeze
so that it is smaller on
fills less space.

5. refraction
is the bending of
waves as they pass
from one substance
into another.

6. vacuum
an empty space in
which there is no air or
other gas.

7. perpendicular
going straight up or to the
side at a 90 degree angle
from another line or
surface.

8. transverse wave
a wave in which the vibrating
element moves in a direction
perpendicular to the direction of
advance of the wave

9. wavelength
the distance from one wave
of energy to another as it is
travelling from one point to
another point.

10. photon
a tiny particle of light or
electromagnetic
radiation.

11. Group Activity

12. What you need: Materials
Flashlight,
5 index card,
mirror,
books
glass and
 water

13. What TO DO:
 Make a hole on the upper part of
each card.
Arrange the cards in a straight line
supported by book.
 turned off the classroom lights to
make the classroom dark and lighter
up the flashlights.

14. What TO DO:
 put the mirror in front
of the first card.
Pour water into the
glass. Place the pen in
the water.

15. Guided Questions:
Did the light, shine in a straight
line? why and why not?
How does the light travel in a
straight line? In a curve line?

16. Guided Questions:
Does the mirror holds up the light?
Why and why not?
Does the pen bending on the glass
with water? Why and why not?

17. PROPER ACTIVITY

18. ANALYSIS

19. Guided Questions:
Did the light, shine in a straight
line? why and why not?
How does the light travel in a
straight line? In a curve line?

20. Guided Questions:
Does the mirror holds up the light?
Why and why not?
Does the pen bending on the glass
with water? Why and why not?

21. What are the sources of
light?

22. Why is light important for
us?

23. How do light travels?

24. Light
Form of energy that makes it
possible to see things.
The brightness produced by the
sun.

25. Light
Light from the sun travels over
90 million miles to earth in only 8
⅓ minutes. Light is made up of
vibrating electric and magnetic
energy.

26. Light
This energy travels as a wave –
it has both frequency and
amplitude. vibrating electric
and magnetic energy

27. Light
light waves vibrate in the
direction perpendicular to the
direction of their motion. They
are called transverse wave
(show photo, perpendicular)

28. Light
Light does not depend on
compressions or refractions. In
a vacuum light travels very fast –
about 300, 000 km/s (186, 000
mi/s).

29. Light
Light travels slightly slower through
mediums like air, water, or glass. In
glass for example, light travels about
197, 000 km/s (121, 000 mi/s)
(show video clip of light show refraction)

30. Light
Light is also a particle, although
light is a wave of energy. It is also
a particle. Particles of light are
called photons.

31. Photon
is a tiny bundle of energy
by which light travels.
(show photo of photons)

32. Wavelength
is the distance between one
peak and the next in a wave.
(show photo of wavelenght)

33. JUMBLE LETTERS
GAME
Each group will receive a jumble letters.
After receiving a jumble letters. I will give the
definition of terms.
You only have 2 minutes allotted time to
answer it.
2 points each game.

34. 1.) AWALVEGEHT
__________ is the
distance between one
peak and the next in a
wave.

35. 2.) HOOPTN
__________is a tiny
bundle of energy by
which light travels

36. 3.) HIGLT
______form of energy that
makes it possible to see things.
The brightness produced by
the sun.

37. 4.) GCIMEANT
__________ relating
to a magnet or
magnetism.

38. 5.) MUUACV
__________ an empty
space in which there is
no air or other gas.

39. INDIVIDUAL
PERFORMANCE

40. MULTIPLE CHOICE:
WRITE THE LETTER THE
CORRECT ANSWER.

41. WRITE THE LETTER THE
CORRECT ANSWER.
1.) Light from the sun travels over ____.
a. 100 million miles
b. 90 million miles
c. 80 million miles
2.) Light is made up of vibrating _______
and ________.
a. compressions and refractions
b. frequency and amplitude
c. electric wave and magnetic energy

42. WRITE THE LETTER THE
CORRECT ANSWER.
3.) ________is the distance between
one peak and the next in a wave.
a. wavelength
b. photon
c. light
4.) In a vacuum light travels very fast
about ______.
a. 300, 000 km/s
b. 250, 000 km/s
c. 25, 000 km/s

43. WRITE THE LETTER THE
CORRECT ANSWER.
5.) Light waves vibrate in the direction
perpendicular to the direction is called
________.
a. wavelength
b. transverse wave
c. electric wave

44. ASSIGNMENT
WRITE IN A ¼ SHEET OF PAPER.
DEFINE THE FOLLOWING:
1. TRANSPARENT
2. TRANSLUCENT
3. OPAQUE

45. THANK YOU!

46. THANK YOU AND GOD
BLESS US ALL!