While tracing the path of a ray of light passing through a rectangular glass slab a student tabulated his observations as given below: S.NO. ∠i ∠r ∠e I 60° 40° 61° II 50° 36° 51° III 40° 28° 39° IV 30° 20° 31° The correct observations is:(A) I(B) II(C) III(D) IV

1

Answers

2016-02-10T23:07:53+05:30
4 th one is the ans  30 30 31
0