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Question - Refraction of Light - Refraction Through a Rectangular Glass Slab

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ConceptRefraction of Light - Refraction Through a Rectangular Glass Slab  

Question

After tracing the path of a ray of light passing through a rectangular glass slab for four different values of the angle of incidence, a student reported his observations in tabular form as given below:

S.No∠ i∠ r∠ e
I30°19°29°
II40°28°40°
III50°36°50°
IV60°40°59°

The best observation is

(A) I

(B) II

(C) III

(D) IV

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