Electromagnetic Waves
2 years ago
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20 QuestionsShow answers
  • Question 1
    30 seconds
    Q.

    Electromagnetic waves vary in

    answer choices

    the speed they travel in a vacuum.

    wavelength and frequency.

    the way they reflect.

    the orientation of their electric and magnetic fields.

  • Question 2
    30 seconds
    Q.

    To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its

    answer choices

    wavelength.

    intensity.

    refraction.

    amplitude.

  • Question 3
    30 seconds
    Q.

    An electromagnetic wave in a vacuum has a wavelength of 0.07m. What is its frequency?

    answer choices

    f= 3.0x 10^8 m/s

    f= 3.0x 10^9Hz

    f=4.3x 10^9Hz

    f=4.3x 10^8m/s

  • Question 4
    30 seconds
    Q.

    Light acts like

    answer choices

    a wave.

    a particle.

    Both a wave and a particle

    neither a wave nor a particle.

  • Question 5
    30 seconds
    Q.

    Which of the following occurs as light travels farther from its source?

    answer choices

    Far from the source, photons come together in a small area.

    The intensity of light increases as photons move away from the source.

    The source gives off less light as photons move away from it.

    Far from the source, photons spread over a larger area.

  • Question 6
    30 seconds
    Q.

    Infrared rays have a shorter wavelength than

    answer choices

    Ultraviolet ray.

    X-rays.

    radar waves.

    gamma rays

  • Question 7
    30 seconds
    Q.

    The full range of frequencies of electromagnetic radiation is called

    answer choices

    visible light.

    radio waves.

    the electromagnetic spectrum.

    invisible radiation.

  • Question 8
    30 seconds
    Q.

    The waves with the longest wavelengths in the electromagnetic spectrum are

    answer choices

    Infrared rays.

    radio waves

    gamma rays

    X-rays

  • Question 9
    30 seconds
    Q.

    The visible light spectrum ranges between

    answer choices

    radar waves and X-rays.

    television waves and infrared rays.

    infrared rays and ultraviolet rays.

    ultraviolet rays and gamma rays.

  • Question 10
    30 seconds
    Q.

    X-ray photographs show softer tissue

    answer choices

    as invisible.

    as dark, highly exposed areas.

    the same as dense bones.

    as bright white areas.

  • Question 11
    30 seconds
    Q.

    Which of the following occurs as a light wave bends when it passes from one medium into another?

    answer choices

    constructive interference

    refraction

    destructive interference

    reflection

  • Question 12
    30 seconds
    Q.

    Newton’s prism experiments showed that white sunlight is made up of

    answer choices

    the full electromagnetic spectrum.

    only blue light.

    all the colors of the visible spectrum.

    only the longest wavelengths.

  • Question 13
    30 seconds
    Q.

    Cellular telephones utilize

    answer choices

    radar waves.

    very high frequency waves.

    very low frequency waves.

    microwaves.

  • Question 14
    30 seconds
    Q.

    When the absorption lines of a galaxy shift toward the blue end of the spectrum, it means that the galaxy is

    answer choices

    moving away from Earth

    small and young

    moving closer to Earth

    large and old

  • Question 15
    30 seconds
    Q.

    The big bang theory explains the

    answer choices

    origin of the universe.

    life cycle of a star.

    Doppler effect.

    arrangement of constellations.

  • Question 16
    30 seconds
    Q.

    Which of the following provides support for the big bang theory?

    answer choices

    red shift

    cosmic microwave background radiation

    elliptical galaxies

    both (a) and (b)

  • Question 17
    30 seconds
    Q.

    Light in the form of a particle that has discrete amount of energy is called a

    answer choices

    Charm

    Photon

    Exciton

    Muon

  • Question 18
    60 seconds
    Q.

    A communications satellite transmits a radio wave at a frequency of 5.0 x 109 Hz. What is the signal’s wavelength? Assume the wave travels in a vacuum.

    answer choices

    (5.0 x 10^9 Hz) x (3.0 x 10^8 m/s)

    (5.0 x 10^9 Hz) / (3.0 x 10^8 m/s)

    (3.0 x 10^8 m/s) / (5.0 x 10^9 Hz)

    (5.0 x 10^9 Hz) + (3.0 x 10^8 m/s)

  • Question 19
    30 seconds
    Q.

    What is the electromagnetic spectrum?

    answer choices

    The full range of wave frequencies of electromagnetic radiation is called the electromagnetic spectrum.

    The rainbow

  • Question 20
    30 seconds
    Q.

    Which is an example of a radio wave

    answer choices

    television

    heat lamp

    vision

    sun light

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