Presentation on theme: “Chapter 26 & 27 Review.”— Presentation transcript:
1 Chapter 26 & 27 Review
2 Which of these electromagnetic waves has the shortest wavelength. aWhich of these electromagnetic waves has the shortest wavelength? a. Radio waves b. Infrared waves c. X-rays d. Ultraviolet waves e. Light waves
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3 Compared to ultraviolet waves, the wavelength of infrared waves is aCompared 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. aWhich 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 aInfrared 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 bThe sensation of color is seen when light falls on the eye’s a. Rods b. Cones c. Both
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10 Which of the following cannot travel in a vacuum. a. A light wave bWhich 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 bWhich 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 cColors 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 eThe 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 bMagenta 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 aColor 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 cA 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 cA mixture of cyan and yellow pigments appears a. Orange b. Green c. Magenta d. Blue e. Blackish brown
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19 The sky is blue because air molecules in the sky act as tiny aThe 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 aA 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- aSunsets 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 bThe 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 aRed 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 aThe 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
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