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1 | |
As a mechanical wave moves from one point in space to another, the elements of the medium |
| | A) | travel along with the wave. |
| | B) | don’t move. |
| | C) | move back and forth or up and down as the wave travels through. |
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2 | |
A wave is set in motion beneath the surface of a tank of water. Which kind of wave must this be? |
| | A) | Both transverse and longitudinal |
| | B) | Only transverse |
| | C) | Only longitudinal |
| | D) | Can’t tell |
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3 | |
Two sound waves travel in air. The first wave has a higher frequency than the second. Which wave has a longer wavelength? |
| | A) | The first wave |
| | B) | The second wave |
| | C) | The two wavelengths are the same |
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4 | |
When a standing wave is produced in a string |
| | A) | each element of the string stops moving and a wave form is produced. |
| | B) | some elements of the string stop moving while others continue to move. |
| | C) | all elements of the string continue to move. |
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5 | |
About how far will sound travel in 1 second? |
| | A) | The length of a football field |
| | B) | The length of 3 football fields |
| | C) | The length of 10 football fields |
| | D) | The length of 100 football fields |
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6 | |
How much stronger is a 40 dB sound than a 20 dB sound? |
| | A) | Just as strong |
| | B) | Twice as strong |
| | C) | 10 times stronger |
| | D) | 100 times stronger |
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7 | |
Red light has a higher frequency than blue light. If your best friend runs toward you with a flashlight, what happens? |
| | A) | The light is noticeably bluer. |
| | B) | The light is noticeably redder. |
| | C) | The light is bluer, but the effect is too small to notice. |
| | D) | The light is redder, but the effect is too small to notice. |
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8 | |
While sound and light are both waves, |
| | A) | both need some kind of medium to travel through (e.g. sound can use air and light can use glass). |
| | B) | neither need a medium to travel through. |
| | C) | sound needs a medium but light doesn’t. |
| | D) | light needs a medium but sound doesn’t. |
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9 | |
Which kind of electromagnetic wave has a wavelength of 1 cm? |
| | A) | X rays |
| | B) | Visible light |
| | C) | Radio waves |
| | D) | Microwaves |
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10 | |
Light traveling in a slow medium passes into a medium where it moves faster. Which ray in the picture matches the direction of the ray as it enters into the second medium?
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| | A) | Ray A |
| | B) | Ray B |
| | C) | Ray C |
| | D) | Ray D |
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11 | |
If white light is incident on a prism, which color travels the slowest? |
| | A) | Red |
| | B) | Yellow |
| | C) | Blue |
| | D) | All colors travel at the same speed |
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12 | |
If blue light falls on a red object, what color does the object appear to be? |
| | A) | Red |
| | B) | Blue |
| | C) | White |
| | D) | Black |
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13 | |
Why is the sky blue? |
| | A) | light from the sun is dispersed by water drops in the air and the blue light bends toward the surface of the earth |
| | B) | light from the sun is scattered off molecules and dust in the air and the blue side scatters better than the red side. |
| | C) | light from the sun is scattered off molecules and dust in the air and the red side scatters better than the blue side. |
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14 | |
When you look at the light produced by a rainbow |
| | A) | all the yellow light that you see has the same frequency. |
| | B) | some of the yellow light that you see can have different frequency. |
| | C) | you don’t actually “see” yellow light. |
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15 | |
Two houses sit about 10 m apart. Which kind of EM radiation most easily bends between the openings of the two houses? |
| | A) | X rays |
| | B) | Ultraviolet |
| | C) | Red light |
| | D) | Infrared |
| | E) | Radio waves |
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16 | |
The door to your classroom is open and is about 1 m wide. Suppose you hear a sound down the hallway outside the door. Even though sound and light are waves, you can hear what happens down the hallway but not see it because |
| | A) | sound and light both have wavelengths smaller than the width of the door. |
| | B) | sound and light both have wavelengths bigger than the width of the door. |
| | C) | sound has a wavelength smaller than the width of the door while the wavelength of the light is bigger. |
| | D) | sound has a wavelength bigger than the width of the door while the wavelength of the light is smaller. |
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