Question

Please explain this property and with all steps.☺

Wrong and useless answers will be soon reported.

Answer :- 23°36

Answer 1

Pre- requiste to understand my answer
1) Snell's Law
2) To convert degree with minutes (23°30) to complete degree(23.5°).
3) sin(17.5°) = 0.30 (approx)
4) Bit adventurous mind .

Snell's Law is
(ni)((sin i) = (nr) sin (r).

where ni = refractive index of air or where incident ray exists.

Hope you understand my writing and it may helps .
My final answer is angle i = 23°34. (approx).