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70. The colored dots that make up the color on a TV screen are (red), (green), and (blue). These are the (additive) primary colors.
a. Red, green, blue; additive
72. The secondary rainbow is dimmer than the primary rainbow because
a. Of an extra reflection and refraction in the drops
73. The cross and X pictures shown in class were an example of pre-thinking by the retina compensating for
the blind spot
74. Good binoculars use prisms to redirect light through the process of
a. Total internal reflection
77. When a light ray passes, at a non-90 degree angle, from air into water, it
a. Bends toward the normal
79. In general, women have somewhat better (color vision), while men have somewhat better (visual activity).
a. Color vision; visual acuity
81. Which of the following series of electromagnetic waves are listed in order of decreasing wavelength?
a. Radio, infrared, visible, ultraviolet, gamma ray
85. For the same wattage, which lamp provides the most light for nighttime viewing?
a. Sodium vapor lamp
86. As you face a plane mirror on the east wall of your room, you raise your north hand. Your image raises
a. Its north hand
92. When looking straight ahead at a primary rainbow, you see violet light from a given raindrop. To see red light in the rainbow, you will need to look
a. At a raindrop higher in the sky
93. The sun is more likely to appear red at sunset than in the middle of the day as a result of the
a. Longer path of air through which sunlight travels
95. It would be very hard to see a tennis ball on the grass courts of Wimbledon if the courts were illuminated with
a. Yellow light
97. When visible light is incident upon clear glass, atoms in the glass
a. Are forced into vibration and then re-emit the light
99. The sky is blue because air molecules in the sky act as tiny
a. Resonators which scatter blue light
101. The image of the "infinitely-far-away" sun produced by a converging lens appears
a. At the focal point
107. Distant dark colored hills appear blue because that is the color of the
a. Atmosphere between the observer and the hill
108. When a light ray passes, at a non-90 degree angle, from glass into water, it
a. Bends away from the normal
111. A pair of sunglasses and a pair of clear reading glasses are left in the sunlight. The hotter glasses would be the
112. When looking straight at a rainbow, you see red light from a given raindrop. To see violet light in the rainbow, you will need to look
a. At a raindrop lower in the sky
119. Different colors are dispersed by a prism because different colors in the prism have different
120. When a light ray passes, at a non-90 degree angle, from water into glass, it
a. Bends toward the normal
122. The critical angle for a transparent material is the angle at and beyond which all light within the material is
125. Colors of ink used for printing are (magenta), (cyan), and (yellow). These are the (subtractive) primary colors.
a. Magenta, cyan, yellow; subtractive
126. A blueberry stain will be more noticeable when it is illuminated by the same intensity of
a. Fluorescent lighting
127. When white light goes from air into a glass prism, the color that refracts the most is
128. Red-hot and blue-hot stars appear white to the eye because
a. They are too dim to fire the cones
131. A diver shines light up to the surface of a smooth pond at a 25-degree angle to the normal. Some light passes into the air above, and the part that reflects back into the water makes an angle to the normal of
a. 25 degrees
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