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Q.

The energy of an x-ray photon is 4 keV. Its frequency is nearly

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a

1018 Hz   

b

1010 Hz

c

1017 Hz   

d

1019 Hz   

answer is A.

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Detailed Solution

E = h\nu \,;\,\therefore \nu = \frac{E}{h} = \frac{{4 \times {{10}^3} \times 1.6 \times {{10}^{ - 19}}}}{{6.6 \times {{10}^{ - 34}}}} \approx {10^{18}}Hz\

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