11 - 1 Light can be described as a stream of photons or a(n...

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1. Light can be described as a stream of photons or a(n) a. signal. b. wave. c. source. d. outlet of energy. e. illuminant. wave 2 The left side of the figure below shows the a. spectrum of visible light. b. different kinds of light. c. spectrum of electromagnetic energy. d. number of photons emitted by a light source. e. amount of heat emitted by a light source. spectrum of electromagnetic energy 3 Light cannot be a. absorbed. b. refracted. c. dissolved. d. transmitted. e. scattered transmitted 4 Refraction is the a. oscillation that travels through a medium. b. bending or spreading out of waves as they pass through a medium. c. bending or spreading out of waves as they pass the edge of an obstacle. d. passing of light with no interruption. e. redirection of light back toward its source. bending or spreading out of waves as they pass through a medium 5 When something strikes a surface, especially light, sound, or heat, and it is redirected (usually back toward its point of origin), it is being a. refracted. b. transmitted. c. scattered. d. reflected. e. absorbed reflected 6 The cornea, shown below, can be thought of as a(n)
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a. transparent window. b. opaque substance. c. refractive medium. d. mirror. e. focusing surface. transparent window 7 The aqueous humor is a(n) a. funny substance. b. watery fluid between the cornea and iris. c. watery fluid between the lens and retina. d. circular opening at the center of the iris. e. opaque fluid. watery fluid between the cornea and iris 8 The retina a. is the tough outer covering that protects the eye. b. contains watery fluid. c. focuses the image. d. diffracts light. e. contains rods and cones. contains rods and cones 9 Accommodation is the process in which the _______ of the eye changes its shape. a. retina b. lens c. pupil d. iris e. cornea pupil 10 Which of the following does not require the attention of a doctor? a. Myopia b. Hyperopia c. Astigmatism d. Emmetropia e. All of the above require a doctor. emmetropia (normal vision) 11 hyperopia image is focused BEHIND the retina 12 The part of the eye that expands or contracts to let more or less light into the eye is the
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a. cornea. b. lens. c. iris. d. sclera. e. fovea iris 13 Fan shaped figure is a chart used to test for a. myopia. b. hyperopia. c. astigmatism. d. macular degeneration. e. retinitis pigmentosa. astigmatism 14 The retina is analogous to the _______ in a camera. a. lens b. stop c. flash d. film e. shutter film 15 The light energy from an object is _______ into neural energy that can be interpreted by the brain. a. transferred b. transformed c. transduced d. absorbed e. translated transduced 16 As shown in the photograph below, eye doctors use an instrument called an ophthalmoscope to look at the _______ of their patients’ eyes. a. cornea b. iris c. lens d. focal point e. fundus fundus (blind spot) 17 _______ sense light. a. Ganglion cells b. Rods and cones c. Horizontal cells
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d. Amacrine cells e. Bipolar cells rods and cones 18 Rods are photoreceptors that are specialized for a. daylight vision.
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