after tracing the path of a ray of light passing through a rectangular glass slab for 4 different values of the angle of incidence , a student reported his observations.
S. no. angle i angle r angle e
1 30* 19* 29*
2 40* 28* 40*
3 50* 36* 50*
4 60* 40* 59*
which is the best observation?
Asked by mrinalini mrinalini
26th February 2015,
8:56 PM
Answered by Expert
Answer:
For best results, the following conditions must be satisfied:
1. The angle of incidence must be nearly equal to the angle of emergence.
2. The angle of refraction must be less than the angle the incidence.
3. 
Out of the 4 observations, the first observation, that is angle i = 30° ; angle r = 19° and angle e = 29° is the correct observation.
In this case, 
Answered by Expert
11th December 2017,
7:07 PM
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