Optics Question 830
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{}^\circ -( 10+t^{2} )=50-t^{2} $
