Electromagnetic Spectrum(General Knowledge > General Science ) Questions and Answers

Question 1. If the energy of an EM wave is directly proportional to its frequency, which of the following has the highest energy?
  1.    Radio
  2.    Microwave
  3.    Infrared
  4.    Visible light
Explanation:-
Answer: Option C. -> Infrared
Question 2. A wave with a large wavelength will have a ______ frequency and _____ energy
  1.    high, low
  2.    high, high
  3.    low, high
  4.    low, low
Explanation:-
Answer: Option D. -> low, low
Question 3. Which electromagnetic waves are used in devices such as heat lamps & TV remote controls?
  1.    ultraviolet rays
  2.    microwaves
  3.    infrared rays
  4.    Both A & B
Explanation:-
Answer: Option C. -> infrared rays
Question 4. Newton’s prism experiments showed that white sunlight is made up of
  1.    the full electromagnetic spectrum.
  2.    only blue light.
  3.    all the colors of the visible spectrum.
  4.    only the longest wavelengths.
Explanation:-
Answer: Option C. -> all the colors of the visible spectrum.
Question 5. Which of the following sets of EM radiation can harm your body cells?
  1.    Gamma ray, microwaves, infrared
  2.    Light, ultraviolet, x-ray
  3.    Microwaves, ultraviolet, infrared
  4.    Ultraviolet, x-ray, gamma ray
Explanation:-
Answer: Option D. -> Ultraviolet, x-ray, gamma ray
Question 6. Which electromagnetic waves help doctors detect broken bones inside your body?
  1.    gamma rays
  2.    x-rays
  3.    ultraviolet rays
  4.    None of these
Explanation:-
Answer: Option B. -> x-rays
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