Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

Please answer the foll:question
Asked by ashwati | 19 Feb, 2009, 08:38: PM
Expert Answer

Suppose for the sake of argument that the minimum deviation occurs when the entrance and exit angles are not equal. In a ray diagram, you can always reverse the direction of a light ray and get another valid light ray. In this case, reversing the ray switches the values of the entrance and exit angles. So there are two different values for the entrance angle that give minimum deviation. But if there's only one minimum, this can't be true. Therefore the initial supposition must be false, and the entrance and exit angles must be equal at minimum deviation. The other part follows from the symmetry arguement.

Answered by | 20 Feb, 2009, 05:39: PM
CBSE 9 - Physics
Asked by sm6878261 | 12 Jan, 2023, 07:42: AM
ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by ahirejay2020 | 07 Jan, 2023, 10:41: PM
ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by sknv159357 | 05 Jan, 2023, 08:29: PM
ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by asyadav1230 | 20 Dec, 2022, 07:17: AM
ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by advscjaglan | 09 Aug, 2022, 08:22: PM
ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by kunaljat51 | 24 Jul, 2022, 10:25: PM
ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by akshatdhamija1409 | 15 Jul, 2022, 11:16: PM
ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by munendramishra478 | 12 Jul, 2022, 08:42: PM
ANSWERED BY EXPERT
Get FREE Sample Mock Papers for Final Exams
Download Now
×