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# 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 e1              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
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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