The index of refraction of diamond is 2.0. The velocity of light in diamond

(b) outer surface of the cornea

Given,n=1.5 and the speed of light in vacuum, c = 3x 108 ms-1. We know that the refractive index is given by the expression n =c/v where c is the...

The bending of a ray of light falling obliquely on a surface when it passes from one medium to another is called refraction.

Refraction of light takes place when it travels fi-om one medium to another because the speed of light is different in the two media.

(i) A stick partly immersed in water appears to be bent at the water surface. (ii) A pool of water appears less deep than it actually is.

1. Snell’s law is defined as “The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, for the light...

From the definition of critical angle, if refracted angle is more than 90°, then reflection occurs, which is known as total internal reflection. So, maximum angle of refraction is 90°.

(d) It occurs in both reflection & refraction & the angle of bending rays is constant.

(d) The ice crystals suspended in cirrus clouds (5-10 k.m.) in the upper atmosphere are responsible for sun’s halo.

(c) Convection currents of hot air rising off a surface have a lower density than the air directly above it. The difference in density cause light passing through the air...