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Question

The energy of the electromagnetic waves is of the order of 15 keV. To which part of the spectrum does it belong?

A
γ - rays
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B
X-rays
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C
Infrared rays
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D
Ultraviolet rays
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Solution

The correct option is B X-rays
λ=hcE=1240 eVnm15×103eV=0.083 nm

Since the order of wavelength is between 10 nm and 0.001 nm, it belongs to X-rays.

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