The energy of the electromagnetic waves is of the order of $15 k e V$ . To which part of the spectrum does it belong?

γ

- rays

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X-rays

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Infrared rays

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Ultraviolet rays

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Solution

The correct option is B X-rays
$λ = \frac{h c}{E} = \frac{1240 e V n m}{15 \times 10^{3} e V} = 0.083 n m$

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

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