Optics Question 887
Question: An unpolarised beam of intensity $ I _{0} $ is incident on a pair of nicols making an angle of $ 60{}^\circ $ with each other. The intensity of light emerging from the pair is
Options:
A) $ I _{0} $
B) $ I _{0}/2 $
C) $ I _{0}/4 $
D) $ I _{0}/8 $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] According to Malus’ law $ I=I _{0}{{\cos }^{2}}\theta =I _{0}({{\cos }^{2}}60^{o})=I _{0}\times {{( \frac{1}{2} )}^{2}}=\frac{I _{0}}{4}. $
