This slide its all about Sound and Light. The characteristics of sound waves, the amplitude, frequency, and a wavelength. And for Lights, I have here a wave theory of light, colors, brightness, intensity. and others.. So, enjoy my slide, I work it for every one.

3. P I T C H

4. L I G H T

5. C O L O R

6. S O U N D

8. Sound Waves
• are longitudinal waves created
from a vibrating source.
• They require a medium (Solid,
liquid, or gas) to transfer
energy.

9. Sound cannot be heard in
outer space because outer
space is a vacuum with no
solids, liquids, or gases.

10. CHARACTERISTICS OF SOUND
WAVES
Physical Quantities:
• AMPLITUDE
• FREQUENCY
• WAVELENGTH

11. PITCH and FREQUENCY
• Pitch is determined by frequency
• “The higher the frequency of the
sound, the higher the pitch produce.”
• Examples: (Sound made by a Violin
or Piccolo)

13. SOUND FREQUENCY RANGES OF HUMAN AND
DIFFERENT ANIMALS

14. Beluga Whale

15. Audible Range
human beings can respond to frequencies
from 20Hz to 20,000Hz.

16. Ultrasonic
-sound waves that have frequencies
above 20,000Hz.
examples: (dog, bat)
Infrasonic
-sound waves whose frequencies are
below 20Hz.
examples: ( earthquake, volcanoes)

18. LOUDNESS and AMPLITUDE
• Loudness is determined by the
amplitude of the sound waves
• “A larger amplitude caused by a
more energetic vibration produces
a sound. Also amplitude is related
to sound intensity.”

19. Decibel (dB)
is the unit used to measure
loudness.

20. QUALITY and WAVE FORM
To distinguish between two different
sounds that have the same pitch and
loudness, timbre or tone quality is used.

22. How does the human voice box work?
In medical terms, the human voice
box is known as the larynx. You can feel
your larynx vibrating if you place your
hand on your throat and hum.

24. Light
• Is light a particle or a wave?
Based on many investigations,
light is now considered to have dual
characteristics. Light sometimes
behavior as a wave, and sometimes
as a particle.

25. Light as a Particle
According to Sir Isaac Newton,
who proposed the corpuscular
theory, light is made up of streams
of particles, and shadow formation is
an evidence of this.

26. TWO REGION:
1. Darker Region, (full shadow)
UMBRA
2. Lighter Region, (partial shadow)
PENUMBRA

27. Solar Eclipse
occurs when the moon casts
its shadow on Earth
Lunar Eclipse
happens when Earth casts its
shadow on the moon.

30. Light as a Wave
Wave theory of Light – first
proposed by Christian Huygens who
rejected Newton’s idea.

31. The difference between
light as a particle, and
light as a wave.

33. Two Properties of Light in
terms of the Wave theory:
Intensity (brightness), and color.

34. The Brightness of Light
The science of measuring the
intensity or brightness of light is
called photometry.

35. Photometric
Instrument

36. Light comes from natural and
artificial sources.
• Luminous objects
examples:Sun, stars
- give off light of their
own

37. The brightness of light that these
objects produce is known a
Luminous Intensity.
Luminous Intensity – measure in
terms of candela (cd).

39. On the other hand, the moon and
the other things that reflect light
from other sources are called
Nonluminous objects. The
amount of illumination they
receive is called iluminance.

40. Color
Visible Light – which travels
at a speed of 3.00x10 m/s, falls
in the wavelength range of about
400nm to 750nm. This range is
known as the visible spectrum,
and within it lie the different
colors from violet to red.
8

41. If light has a wavelength shorter
than 400nm, it is called
Ultraviolet light (UV), but if it has
a wavelength greater than
750nm, it is called infrared light
(IR).

43. • When light passes through the
prism through a phenomenon
called dispersion, the light
spreads out into bands of color,
called spectrum.
• A prism separates white light into
the colors of the rainbow –
(ROYGBIV).

46. A. Write the letter of the correct
answer.
1. Frequencies that is audible to
human
a. below 20Hz
b. from 20Hz to 20,000Hz
c. above 20,000Hz
d. all of the above

47. 2. What is the voice box
of the human?
a. lungs
b. larynx
c. mouth
d. esophagus

48. 3. It is used to measure loudness.
a. decibels
b. photometry
c. meter stick
d. ruler

49. 4. Which color of the visible light
spectrum has the lowest
frequency?
a. Red
b. Blue
c. Green
d. Violet

50. 5. He proposed the corpuscular
theory.
a. Galileo
b. Isaac Newton
c. Christian Huygens
d. Albert Einstein

51. 6. What objects that do not give off
their own light?
a. luminous
b. nonluminous
c. luminescent
d. none of the above

52. 7. It refers to a longitudinal waves
created from a vibrating source.
a. Sound waves
b. loudness
c. frequency
d. none of the above

53. 8. These are the examples of
ultrasonic except.
a. bat
b. dog
c. earthquake
d. mouse

54. 9. It is a science of measuring the
intensity or brightness of light.
a. Tape measure
b. Photometry
c. Thermometer
d. Ruler

55. 10. It occurs when the moon
casts its shadow on Earth.
a. Lunar Eclipse
b. Moon Eclipse
c. Solar Eclipse
d. Sun Eclipse

56. B. Write T if the statement is true,
and F if otherwise.
1. Sound cannot be heard in outer
space because outer space is
a vacuum with no solids, liquids,
or gases.

57. 2. In Pitch and frequency, “The higher
the frequency of the sound, the lower
the pitch produce.”
3. To distinguish between two different
sounds that have the same pitch and
loudness, we use timbre or tone
quality.

58. 4. a wavelength greater than 750nm, it is
called infrared light (IR).
5. The Sun, Star are the examples of
nonluminous objects.

59. Assignment:
Research and define the following
words.
1. Heat
2. Electricity
3. Temperature
4. Thermal Energy
5. Conduction
6. Convection
7. Radiation