Optics Question 953
Question: r and r? denote the angles inside an equilateral prism, as usual, in degrees. Consider that during some time interval from $ t=0 $ to $ t=t,r’ $ varies with time as $ r’=10+t^{2}. $ During this time r will vary as: (Assume that r and r? are in degree):
Options:
A) $ 50-t^{2} $
B) $ 50+t^{2} $
C) $ 60-t^{2} $
D) $ 60+t^{2} $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] In a prism $ r+r’=A $
$ \Rightarrow $ $ r=A-r’ $
$ \therefore $ $ r=60^{0}-(10+t^{2})=50-t^{2} $
