When light ray travels from denser to rarer medium, the relation between ‘r’ and ‘i’ is

When a light ray travels from a denser medium to a rarer medium, it bends away from the normal due to refraction. This behavior is described by Snell's law, which states that the ratio of the sine of the angle of incidence (i) to the sine of the angle of refraction (r) is constant and equal to the ratio of the refractive indices of the two media.

Since the refractive index of the denser medium is greater than that of the rarer medium, the angle of refraction (r) is greater than the angle of incidence (i). Therefore, the correct option is:

b. r > i