Optics Question 1046
Question: The frequency of light ray having the wavelength 3000 Å is
[DPMT 2002]
Options:
A) 9 x 1013 cycles/sec
B) 1015 cycles/sec
C) 90 cycles/sec
D) 3000 cycles/sec
Show Answer
Answer:
Correct Answer: B
Solution:
$ \nu =\frac{c}{\lambda }=\frac{3\times 10^{8}}{3000\times {{10}^{-10}}}=10^{15} $ cycles/sec