Saved Bookmarks
| 1. |
If a prism having refractive index `sqrt 2` has angle of minimum deviation equal to the angle of refraction of the prism, then the angle of refraction of the prism is:A. `30^(@)`B. `45^(@)`C. `60^(@)`D. `90^(@)` |
|
Answer» Correct Answer - D Put `A=delta_(min)` and `mu= sqrt(2)` The relation `mu=(sin ((A+delta_(min))/(2)))/(sin((A)/(2)))` `sqrt(2)=(sinA)/(sin A//2) rArr sqrt(2)=2 cos A//2` `rArr cos A//2 =(1)/(sqrt(2)) rArr A//2 =45^(@)` `rArr A=90^(@)`. |
|