Question

In your laboratory you trace the path of light rays through a glass slab for different values of angle of incidence (Li) and in each case measure the- values of the corresponding angle of refraction (Lr) . and angle of emergence (Le). Other basis of your observations your correct conclusion is:; A. i is more than r, but nearly equal to e; B. i is less thanr, but nearly equal to e; C. i is more than e, but nearly equal to r; D. i is less than e, but nearly equal to r(All India - 2016)

Answer 1

Answer:

I don't understand your question dude ☺️

thx dear

Answer 2

The correct conclusion is :

A. i is more than r but nearly equal to e

The ray of light bends towards normal because it enters from a rarer medium (air) to a denser medium (glass slab).

Thus, angle of incidence (∠i) is more than angle of refraction (∠r) .

∠i > ∠r

Now, As per Snell's law,

μ = sin (i) / sin (r₁)​            (eq 1)

when light goes from glass into air,

1/μ = sin (r₂​) / sin (e)

Also, r₁​ = r₂​  (Corresponding angles)

∴ 1/μ = sin (r₁) / sin (e)

     μ = sin (e) / sin (r₁)      (eq 2)

From eq1 and eq2, we get,

sin (i) / sin (r₁)​ = sin (e) / sin (r₁)​

⇒∠i=∠e