Answers to Physics Module Questions - Module #26
  1. Blue light has ___ wavelength compared to Red light.
    1. the same
    2. longer
    3. zero
    4. infinite
    5. shorter
    6. none of the above
  2. Earth's atmosphere lets in most
    1. infrared light
    2. ultraviolet light
    3. visible light
    4. of any kind of radiation
    5. none of the above
    6. all of the above
  3. Which of these waves have the longest wavelength?
    1. infrared light
    2. ultraviolet light
    3. red light
    4. blue light
    5. X-rays
    6. yellow light
    7. radio waves
  4. An electromagnetic wave has a wavelength of 1 m. What is its frequency?
    1. 1 Hertz
    2. 3 Hz
    3. 300 Hz
    4. 3000 Hz
    5. 30,000 Hz
    6. 300,000 Hz
    7. 3,000,000 Hz
    8. 300,000,000 Hz
  5. If Proxima Centauri, our closest star, were to explode right now, it would take about 4 years for us to know about it because
    1. it takes 4 years to build a big telescope to see the star
    2. it takes 4 years to obtain funding to build the necessary telescope
    3. the star is 4 years old
    4. it takes 4 years for the light from this star to reach us
    5. it takes 4 years for a signal from us to reach the star
    6. it takes 4 years for us to travel by space-ship to the star

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