Question

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 (angle)i (angle)r (angle)e
I 60 40 61
II 50 36 51
III 40 28 39
IV 30 20 31
Write the correct observation and explain?

Answer 1

1 is correct. hope it help you