1. Chapter 26 & 27 Review

2. Which of these electromagnetic waves has the shortest wavelength. a
Which of these electromagnetic waves has the shortest wavelength? a. Radio waves b. Infrared waves c. X-rays d. Ultraviolet waves e. Light waves

3. Compared to ultraviolet waves, the wavelength of infrared waves is a
Compared to ultraviolet waves, the wavelength of infrared waves is a. Shorter b. Longer c. The same

4. Compared to radio waves, the velocity of visible light waves in a vacuum is a. Less b. More c. The same

5. The source of all electromagnetic waves is a. Heat b. Magnetic fields c. Electric fields d. Vibrating charges e. None of these

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

7. Compared to its average speed in air, the average speed of a beam of light in glass is a. More b. Less c. The same

8. Infrared waves are often called heat waves because they a
Infrared waves are often called heat waves because they a. Emanate from relatively hot sources b. Consist of frequencies lower than those of visible light c. Induce resonance in molecules and increase internal energy in a substance d. Are absorbed rather than reflected by the skin e. Are predominant waves emitted by the sun

9. The sensation of color is seen when light falls on the eye’s a. Rods b
The sensation of color is seen when light falls on the eye’s a. Rods b. Cones c. Both

10. Which of the following cannot travel in a vacuum. a. A light wave b
Which of the following cannot travel in a vacuum? a. A light wave b. A sound wave c. A radio wave d. All of these e. None of these

11. Which will warm up quicker in sunlight. a. A piece of colored glass b
Which will warm up quicker in sunlight? a. A piece of colored glass b. A piece of clear glass c. Both the same

12. Colors seen on TV result from color a. Addition b. Subtraction c
Colors seen on TV result from color a. Addition b. Subtraction c. Both d. neither

13. The complementary color of blue is a. Red b. Green c. Yellow d. Cyan e
The complementary color of blue is a. Red b. Green c. Yellow d. Cyan e. Magenta

14. Magenta light is really a mixture of a. Red and blue light b
Magenta light is really a mixture of a. Red and blue light b. Red and cyan light c. Red and yellow light d. Yellow and green light e. None of these

15. Color seen on the cover of our physics book result from color a
Color seen on the cover of our physics book result from color a. Addition b. Subtraction c. Both d. Neither

16. Look at a full-color picture in a magazine with a magnifying glass and you’ll see that the inks used are a. Red, green and blue b. Red, green, blue and black c. Magenta, cyan and yellow d. Magenta, cyan, yellow and black

17. A mixture of red and green pigments appears a. Orange b. Yellow c
A mixture of red and green pigments appears a. Orange b. Yellow c. Magenta d. Blue e. Blackish brown

18. A mixture of cyan and yellow pigments appears a. Orange b. Green c
A mixture of cyan and yellow pigments appears a. Orange b. Green c. Magenta d. Blue e. Blackish brown

19. The sky is blue because air molecules in the sky act as tiny a
The sky is blue because air molecules in the sky act as tiny a. Mirrors which reflect only blue light b. Resonators which scatter blue light c. Sources of white light d. prisms

20. A whitish sky is evidence that the atmosphere contains a
A whitish sky is evidence that the atmosphere contains a. Predominately small particles b. Predominately large particles c. A mixture of particle sizes d. Water vapor e. pollutants

21. Sunsets are red, blue jays are blue; the reason’s the same- a
Sunsets are red, blue jays are blue; the reason’s the same- a. Scattered sunlight b. Pigments that reflect in the blue c. Aerosols and all such goo d. No one knows, but it is true

22. The sky is deepest blue a. Just before a rainstorm b
The sky is deepest blue a. Just before a rainstorm b. During a rainstorm c. Just after a rainstorm d. When the air is humid e. Just before sunset

23. Red sunsets are due to lower frequencies of light that a
Red sunsets are due to lower frequencies of light that a. Are scattered from large particles in the air b. Are refracted from large particles in the air c. Are reflected by clouds and relatively large particles in the air d. Survive being scattered in the air e. Appear reddish-orange to the eye

24. The whiteness of the clouds is evidence in the clouds for a variety of a. Particle sizes b. Molecules c. “seeds” upon which condensation of cloud material forms d. Light intensities e. Water prisms

25. The greenish-blue of water is evidence for the a
The greenish-blue of water is evidence for the a. Reflection of greenish blue light b. Reflection of red light c. Absorption of greenish blue light d. Absorption of red light e. Interaction between green and blue frequencies of light

26. The fact that you can get sunburned while in the shade is evidence that the atmosphere a. Scatters infrared light b. Absorbs infrared light c. Scatters ultraviolet light d. Absorbs ultraviolet light

27. Know… - the electromagnetic spectrum - how the size and position of the light source affects a shadow - the additive primary colors and which subtractive color is the result - why the sky, clouds, water and sunsets are the color they are