Question 3(i)If the refractive index of air with respect to glass is expressed as gμa=sin isin r^g\mu_a = \dfrac{ ext{sin i}}{ ext{sin r}}gμa=sin rsin i answer the following:(a) Express the similar expression for aμg^a\mu_gaμg in terms of i and r.(b) If angle r = 90°, what is the corresponding angle (i) is called?(c) Write down the physical significance of angle (i) in part (b).

Question

Question 3(i)If the refractive index of air with respect to glass is expressed as gμa=sin isin r^g\mu_a = \dfrac{	ext{sin i}}{	ext{sin r}}gμa​=sin rsin i​ answer the following:(a)	Express the similar expression for aμg^a\mu_gaμg​ in terms of i and r.(b) If angle r = 90°, what is the corresponding angle (i) is called?(c) Write down the physical significance of angle (i) in part (b).

Accepted Answer

(a) The expression for aμg = sin rsin i\dfrac {	ext {sin r}}{	ext {sin i}}sin isin r​(b) When refractive angle r = 90° then, the corresponding angle of incidence i will be equal to critical angle.(c) The phenomenon of total internal reflection occurs when the angle of incidence exceeds the value of i obtained in part (b).

Solved Sample Paper 5 — Question 23

Question 3(i)