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Question

Electromagnetic radiation has an energy of 13.2keV. Then, the radiation belongs to the region of


A

Visible light

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B

Ultraviolet

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C

Infrared

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D

X- rays

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Solution

The correct option is D

X- rays


Step 1. Given data

The energy of electromagnetic radiation is E=13.2keV=13.2×103eV

Step 2. Calculation

We know that de-Broglie wavelength in angstrom is given by λ=12400EineV

Where λ is the wavelength of electromagnetic radiation

Eis the energy of electromagnetic radiation

Now,

λ=1240013.2×103=0.939A°1A°

Therefore, electromagnetic radiation has an energy of 13.2keV belongs to the X-ray region of the electromagnetic spectrum.

Hence, The correct option is (D)


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