Question

A student has to perform an experiment on tracing the path of a ray of light passing through a rectangular glass slab for three different angles of incidence . 2 of his friends suggest the following options to him : A) Draw the incident rays corresponding to 20o , 50o , 70oas the angles of incidence and fix the two pins on the incident rays nearly 2 cm apart . . B) Draw the incident rays corresponding to 30o , 45o , 60o as the angles of incidence and fix the two pins on the incident rays nearly 8 cm apart
which one is better
give reason for answer​

Answer 1

Answer:

angle of emergence is less than the angle of refraction

B

angle of emergence is greater than the angle of incidence

C

emergent ray is parallel to the refracted ray

A.  We know that angle of incidence is equal to angle of emergence. 

And for a light ray going from rarer to denser medium we also know that angle of incidence is greater than angle of refraction

Answer 2

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