Review Questions

  1. Which of the following lists the electromagnetic waves from longest wavelength to shortest wavelength?

    1. X-ray, ultraviolet, visible light
    2. visible light, ultraviolet, X-ray
    3. ultraviolet, X-ray, visible light
    4. ultraviolet, visible light, X-ray
    5. X-ray, visible light, ultraviolet

  2. In a vacuum, all electromagnetic waves have the same

    1. amplitude.
    2. frequency.
    3. wavelength.
    4. intensity.
    5. speed.

  3. Violet light has a frequency of 7.5 × 1014 Hz. The wavelength of violet light is most nearly

    1. 2.25 × 1023 m.
    2. 2.5 × 106 m.
    3. 4 × 10−7 m.
    4. 7.5 × 10−7 m.
    5. 2.25 × 107 m.

  4. In the figure shown, the angle of incidence is θ.

    Which angle is the angle of reflection?

    1. 1
    2. 2
    3. 3
    4. 4
    5. 5

  5. A beam of light passes from the air through a thick piece of glass as shown.

    Which of the following angles is the angle of refraction?

    1. 1
    2. 2
    3. 3
    4. 4
    5. 5

  6. The speed of light in a piece of crown glass is 2 × 108 m/s. What is the index of refraction of crown glass?

    1. 2
    2. 1.5
    3. 0.67
    4. 0.33
    5. 0.2

  7. A beam of light passes from air into glass. Which of the following statements is true?

    1. The angle of incidence is greater than the angle of refraction in the glass.
    2. The angle of incidence is less than the angle of refraction in the glass.
    3. The angle of incidence is equal to the angle of refraction in the glass.
    4. The frequency of the light decreases.
    5. The frequency of the light increases.

  8. Total internal reflection occurs when

    1. light passes from air into water.
    2. light refracts as it exits glass into air.
    3. light reflects off of a mirror.
    4. light passing through glass is reflected inside the glass.
    5. the angle of incidence is less than the critical angle.