1.
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A wave's velocity is the product of the
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Student Response |
Value |
Correct Answer |
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frequency times the period of the wave. |
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period times the energy of the wave. |
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amplitude times the frequency of the wave. |
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amplitude times the wavelength of the wave. |
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frequency times the wavelength of the wave. |
100%
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Score: |
1/1
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2.
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Consider this diagram. Which statement is true?
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Student Response |
Value |
Correct Answer |
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The amplitude is 4. |
100%
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The amplitude is 6. |
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The amplitude is 12. |
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The amplitude is 8. |
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The amplitude cannot be determined from this diagram. |
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Score: |
1/1
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3.
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Which of these is constant for ALL types of electromagnetic radiation in a vacuum?
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Student Response |
Value |
Correct Answer |
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amplitude |
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frequency |
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wavelength |
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velocity |
100%
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photon energy |
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Score: |
1/1
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4.
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Which form of electromagnetic radiation is absorbed by carbon dioxide
and water vapor in our atmosphere? (see section on opacity)
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Student Response |
Value |
Correct Answer |
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infrared |
100%
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radio |
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gamma rays |
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visible light |
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ultraviolet |
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Score: |
1/1
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5.
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Which form of electromagnetic radiation would be blocked in the stratosphere by ozone? (see section on opacity)
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Student Response |
Value |
Correct Answer |
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visible light |
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microwaves |
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ultraviolet |
100%
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cosmic rays |
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infrared |
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Score: |
1/1
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6.
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The two forms of electromagnetic radiation that penetrate the atmosphere best are:
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Student Response |
Value |
Correct Answer |
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ultraviolet and visible light. |
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visible and radio waves. |
100%
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X-rays and gamma rays. |
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infrared and microwaves. |
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visible and infrared light. |
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Score: |
1/1
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7.
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Of all the forms of electromagnetic radiation, the one with the lowest frequency is
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Student Response |
Value |
Correct Answer |
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gamma rays. |
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visible light. |
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ultraviolet rays. |
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microwaves. |
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radio waves. |
100%
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Score: |
1/1
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8.
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Electromagnetic radiation with a wavelength of 700 nm would be:
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Student Response |
Value |
Correct Answer |
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microwaves. |
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violet light. |
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ultraviolet light. |
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X-rays. |
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red light. |
100%
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Score: |
1/1
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9.
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There are no radio telescopes in space because
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Student Response |
Value |
Correct Answer |
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there is too much radio noise in space, so a radio telescope won't work out there |
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you need an array, like the VLA to detect ANY radio radiation, so it is just not realistic to put an entire array in space |
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no one has built an antenna large enough to reach astronomical objects yet |
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radio waves penetrate Earth's atmosphere so there is no need to put one in space |
100%
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radio telescopes are too fragile and expensive to make to put into space |
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Score: |
1/1
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10.
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The Doppler Effect is a phenomenon that allows one to measure an object's
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Student Response |
Value |
Correct Answer |
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chemical composition. |
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tangential motion. |
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temperature. |
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radial motion. |
100%
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radius. |
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Score: |
1/1
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11.
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When an objects is moving away from us, their wavelength seems
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Student Response |
Value |
Correct Answer |
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lower |
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higher |
100%
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the same |
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Score: |
1/1
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12.
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A mechanical wave is moving at 40 m/s and its frequency is 20 HZ, its wavelength in m is
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Student Response |
Value |
Correct Answer |
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2 |
100%
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40 |
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8 |
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0.5 |
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Score: |
1/1
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13.
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All electromagnetic vave move in vaccum at the same
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Student Response |
Value |
Correct Answer |
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speed |
100%
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frequency |
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period |
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wavelength |
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Score: |
1/1
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14.
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Electromagnetic radiation
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Student Response |
Value |
Correct Answer |
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can only travel in a dense medium. |
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is the same as a sound wave. |
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has only the properties of waves. |
0%
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has nothing in common with radio waves. |
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can behave both as a wave and as a particle. |
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Score: |
0/1
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15.
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The Earth's ionosphere partially blocks which form of electromagnetic radiation?
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Student Response |
Value |
Correct Answer |
|
infrared |
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visible light |
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gamma rays |
0%
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radio |
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ultraviolet |
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Score: |
0/1
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16.
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The visible color of electromagnetic radiation that has the shortest wavelength is
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Student Response |
Value |
Correct Answer |
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green. |
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violet. |
100%
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blue. |
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red. |
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orange. |
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Score: |
1/1
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17.
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Colors appear different to us because of their photons' different:
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Student Response |
Value |
Correct Answer |
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polarization. |
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speeds. |
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frequencies. |
100%
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magnetic fields. |
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amplitudes. |
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Score: |
1/1
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18.
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There are no X-ray telescopes on Earth because
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Student Response |
Value |
Correct Answer |
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we can't figure out how to direct an X-ray beam through space |
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no one has yet invented an X-ray telescope that works |
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there are no astronomical objects that emit X-rays |
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they are too expensive to build |
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X-rays don't penetrate Earth's atmosphere |
100%
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Score: |
1/1
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19.
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The radiation our eyes are most sensitive to lies in the color
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Student Response |
Value |
Correct Answer |
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red at 6563 Angstroms. |
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violet at 7,000 Angstroms. |
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blue at 4,321 nanometers. |
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yellow-green at about 550 nm. |
100%
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black at 227 nm. |
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Score: |
1/1
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20.
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If a light source is approaching you at a speed very close to the speed of light, it will appear (see doppler effect)
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Student Response |
Value |
Correct Answer |
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brighter than it is. |
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redder than it is. |
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bluer than it is. |
100%
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lower temperature than it is. |
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fainter than it is. |
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Score: |
1/1
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