Dual Nature Of Light Question 324
Question: If the wavelength of light is 4000 Å, then the number of waves in 1 mm length will be [J & K CET 2004]
Options:
A) 25
B) 0.25
C) $ 0.25\times 10^{4} $
D) $ 25\times 10^{4} $
Show Answer
Answer:
Correct Answer: C
Solution:
Number of waves $ =\frac{{{10}^{-3}}}{4000\times {{10}^{-10}}}=0.25\times 10^{4} $
BETA
