X-rays of =1 A have frequency - Vidyadip

MCQ

X-rays of $\lambda=1 \mathring A$ have frequency

A
$3 \times 10^8 \mathrm{~Hz}$
✓
$3 \times 10^{18} \mathrm{~Hz}$
C
$3 \times 10^{10} \mathrm{~Hz}$
D
$3 \times 10^{15} \mathrm{~Hz}$

✓

Answer

Correct option: B.

$3 \times 10^{18} \mathrm{~Hz}$

$v=\frac{c}{\lambda}=\frac{3 \times 10^8}{1 \times 10^{-10}}=3 \times 10^{18} \mathrm{~Hz}$

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