Electromagnetic Waves. Light

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11.6Electromagnetic Waves. Light

Physics Revision Questions for Electromagnetic Waves. Light

1. An electromagnetic wave has a frequency of 4.0 × 1012 Hz. What is its wavelength in metres?

  1. 7.5 millimetre
  2. 1.33 millimetre
  3. 75 micrometre
  4. 75 millimetre

Correct Answer: C

2. What kind of EM wave is a transverse wave emitted by the Sun whose wavelength is equal to 0.05 mm?

  1. Visible light
  2. Infrared radiation
  3. Microwave
  4. Radio wave

Correct Answer: C

3. What part of EM spectrum is the visible light approximately?

  1. 3/16
  2. 3/160
  3. 1/100
  4. 3/220

Correct Answer: D

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