Q. X-rays of $\lambda = 1\mathring{\mathrm{A}}$ have frequency
A) $3 \times 10^{8}Hz$
B) $3 \times 10^{18}Hz$
C) $3 \times 10^{10}Hz$
D) $3 \times 10^{15}Hz$
Explanation
(b) $v = \frac{c}{\lambda} = \frac{3 \times 10^{8}}{1 \times 10^{- 10}} = 3 \times 10^{18}Hz$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.