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Electromagnetic Waves — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Waves1 Mark
MCQ
In electromagnetic spectrum, the frequencies $\gamma-$rays, $X-$rays and ultraviolet rays are denoted by $n_1, n_2$ and $n_3$ respectively then:
  • ✓
    $n _1 > n _2 > n _3$
  • B
    $n_1 < n_2 < n_3$
  • C
    $n _1 > n _2 < n _3$
  • D
    $n _1 < n _2 > n _3$
✓

Answer

Correct option: A.
$n _1 > n _2 > n _3$

From electromagnetic spectrum, frequencies of $\gamma-$rays is greater than frequency of $X-$rays. Frequency of Xrays is greater than frequency of ultraviolet rays.

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