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Chap 2 Study Guide – Answers
1 Because of the way in which the lens of the eye bends light rays, the image produced by the lens is
A) black and white. B) usually blurred. C) right side up. D) upside down.
2. Electromagnetic wave with a wavelength shorter than radio waves and are felt as heat are called
A) ultraviolet rays B) microwave C) radio wave D) infrared rays
3. Frosted glass and wax paper are
A) transparent. B) translucent. C) clear. D) opaque.
4. Which of the following is not an electromagnetic wave?
A) light B) microwave C) radio wave D) sound wave
5. The maximum distance that the particles of a medium move from the rest position is the
A) amplitude of the wave. B) wavelength of the wave.
C) frequency of the wave. D) speed of the wave.
6. Clear glass, water, and air are examples of what kind of material?
A) opaque B) fluid C) translucent D) transparent
7. Which waves have some electrical properties and some magnetic properties?
A) longitudinal waves B) transverse waves
C) mechanical waves D) electromagnetic waves
8. Mechanical waves are created when a source of energy causes a medium to
A) move. B) compress. C) expand. D) vibrate.
9. What instruments use lenses or mirrors to collect and focus light from distant objects?
A) microscopes B) optical fibers C) telescopes D) lasers
10. Which of the following statement is true of light?
A) Light wave can not travel in a vacuum B) Light waves can travel in a vacuum
C) Light is not a wave
D) Light waves travels through aether
11. Cell phones use which electromagnetic waves to communicate?
A) sound waves. B) X-rays waves C) microwaves D) infrared waves.
12. Everyone has a blind spot because of the interference caused by the
A) cornea. B) optic nerve. C) rods D) cones.
13. A material that reflects or absorbs any light that strikes it is
A) opaque. B) transparent. C) translucent. D) concave.
Turn over
14. Rod cells enable you to see
A) colors. B) at night. C) in bright lights. D) far away objects.
15. A disturbance that transfers energy from place to place is called a
A) wave. B) medium. C) vibration. D) compression.
16. The low point of a wave is called a ________.
A) trough
B) frequency
C) crest
D) hertz
17. How would a red tomato look under blue light?
A) The tomato would seem to disappear. B) The tomato would still appear red.
C) The tomato would appear black.
D) The tomato would appear white.
18. What happens when light passes from air into water?
A) The light speeds up.
B) The light continues at the same speed.
C) The light slows down. D) The light forms a mirage.
19. Which electromagnetic waves have the longest wavelengths and lowest frequencies?
A) infrared waves B) radio waves C) ultraviolet rays D) gamma rays
20. The distance between two corresponding parts of a wave is the wave’s
A) amplitude. B) wavelength. C) frequency. D) speed.
21. What is the medium of an ocean wave?
A) light B) water C) crest D) wavelength
22. The bending of light rays as they enter a new medium is called
A) diffuse reflection. B) regular reflection.
C) refraction.
D) diffraction.
23. Which light sensitive cells in the retina respond to color?
A) pupil B) iris C) rods D) cones
24. When the surface of a mirror curves inward, like the inside of a bowl, it is called a
A) plane mirror. B) convex mirror. C) concave mirror. D) diffuse mirror.
25. A flat sheet of glass with a silver-colored coating on one side is a
A) plane lens. B) plane mirror. C) convex mirror. D) concave lens.
26. When a police officer uses radar for speed control, the officer is using what kind of electromagnetic
waves?
A) radio waves B) gamma rays C) ultraviolet rays D) X-rays
27. Which device uses lenses to focus light rays and record an image of an object on photographic film?
A) microscope B) reflecting telescope C) refracting telescope D) camera