1. Q: Which travels faster, sound or light?
A: Sound
B: Light

2. Q: Which can travel through a vacuum (space with no substance)?
A: Light
B: Sound

3. Which type of wave has longer wavelength. A. Radio waves B
Which type of wave has longer wavelength? A. Radio waves B. Visible light C. Gamma rays

4. Q: What travels faster than light?
A: microwaves
B: nothing
C: sound
D: air

5. D: photons Q: What type of particles make up light? A: air B: atoms
C: molecules
D: photons

6. Q: Which is not a primary color?
A: red
B: green
C: blue
D: yellow

7. A: white B: black C: brown D: green
Q: If you add red, yellow, and blue light together what color light do you get?
A: white
B: black
C: brown
D: green

8. what type of frequency does it have? A: high B: low
Q: If a wave has a short wavelength,
what type of frequency does it have?
A: high
B: low

9. What color does an object look that reflects light
of all wavelengths in equal amounts?
A: white
B: black
C: red
D: blue

10. the longest wavelength? A: purple B: blue C: green D: red
Q: Which color of light has
the longest wavelength?
A: purple
B: blue
C: green
D: red

11. for light to travel from the sun? A: 2 seconds B: 30 seconds
Q: About how long does it take
for light to travel from the sun?
A: 2 seconds
B: 30 seconds
C: 8 minutes
D: 1 hour

12. The color of an object we see is determined by the
a. colors of light reflected by the object.
b. frequencies of light absorbed by the object.
c. colors of light shining on the object.
d. frequencies of light reflected by the object.
e. all of the above

13. Colors seen on TV result from color
a. subtraction.
b. addition.
c. none of the above

14. a. blue and yellow are complementary colors.
When blue and yellow paints are mixed together, the result is green. The reason for this is that
a. blue and yellow are complementary colors.
b. yellow pigments absorb green light and reflect all the others.
c. blue reflects only blue light, and yellow reflects almost all colors of light.
d. between blue and yellow pigments, all colors are absorbed except green.
e. blue absorbs yellow light and yellow absorbs blue light.

15. The three paint colors that are useful for color subtraction are
a. magenta, cyan, and red.
b. red, blue, and yellow.
c. magenta, green, and yellow.
d. red, green, and blue.
e. magenta, cyan, and yellow.

16. A sheet of red paper will look black when illuminated with
a. cyan light.
b. yellow light.
c. red light.
d. magenta light.
e. none of the above

17. The reason the sky is blue is that air molecules
a. are blue.
b. reflect blue light.
c. absorb yellow light.
d. absorb and then reemit blue light, scattering it in all directions.
e. absorb green light.

18. Electromagnetic waves are
transverse waves.
b. longitudinal waves.

19. Compared to the velocity of radio waves, the velocity of visible light waves is
a. slower.
b. faster.
c. the same.

20. Which of the following are fundamentally different from the others?
a. Gamma rays
b. Radio waves
c. Sound waves
d. Light waves
e. X-rays

21. Compared to its speed in air, the speed of light in water is
a. slower.
b. the same.
c. faster.

22. Glass is transparent to visible light, but not to
a. ultraviolet.
b. infrared.
c. both a and b.
d. none of the above

23. What is the ultimate source of electromagnetic waves?
a. Vibrating atoms
b. Vibrating molecules
c. Radio sets
d. Vibrating charged particles
e. TV antennas

24. Light does not pass through what kind of materials?
a. transparent
b. opaque
c. neither a nor b

25. What is the wavelength of an electromagnetic wave that has a frequency of 1 Hz?
a. More than 1 m
b. Less than 1 m
c. 1 m

26. If two polarizing filters are held with their polarization axes at right angles to each other, the amount of light transmitted compared to when their axes are parallel is
a. zero.
b. half as much.
c. the same.
d. twice as much.