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# While Tracing the Path of a Ray of Light Passing Through a Rectangular Glass Slab a Student Tabulated His Observations as Given Below: - Science

Course
ConceptRefraction of Light Refraction Through a Rectangular Glass Slab

#### 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. ∠i ∠r ∠e I 60° 40° 61° II 50° 36° 51° III 40° 28° 39° IV 30° 20° 31°

The correct observations is:

(A) I

(B) II

(C) III

(D) IV

#### Solution

Using Snell’s law, sin i/sin r = n2/n1, check the ratio of the sine values of i and r which gives 1.5 (we know, n2=1.5 and n1=1) will be the answer.