NEETPhysicsRay Optics
A right-angled prism of refractive index μ 1 is placed in a rectangular block of refractive index μ 2 , which is surrounded by a medium of refractive index μ 3 , as shown in the figure. A ray of light e enters the rectangular block at normal incidence. Depending upon the relationships between μ 1 , μ 2 and μ 3 , it takes one of the four possible paths e f , e g , e h or e i . Match the paths in List I with conditions
Options
- Aa-s;b-r;c-p;d-q;
- Ba-q;b-s;c-r;d-p;
- Ca-q;b-r;c-s;d-p;
- Da-s;b-r;c-p;d-q;
Correct answer
C. a-q;b-r;c-s;d-p;
Step-by-step solution
For e → i , 4 5 ∘ > θ c sin 4 5 ∘ > sin θ c 1 2 > μ 2 μ 1 μ 1 > 2 μ 2 For e → f , an angle of refraction is lesser than the angle of incidence. So, μ 2 > μ 1 and then μ 2 > μ 3 . For e → g , μ 1 = μ 2 . For e → h , μ 2 < μ 1 < 2 μ 2 and μ 2 > μ 3 .