Light – Reflection and Refraction

Light enters from air to glass, having a refractive index of 1.50. What is the speed of light in the glass? The speed of light in a vacuum is 3 x 108 ms-1.

Refractive index of a medium (nm) = Speed of light in vacuum(C) / Speed of light in the medium(V) Speed of light in vacuum (c) = 3 × 108 m/s Refractive index of glass (ng) = 1.50 Speed of light in the glass (v) = Speed of light in vacuum(C) / Refractive index of glass …

Light enters from air to glass, having a refractive index of 1.50. What is the speed of light in the glass? The speed of light in a vacuum is 3 x 108 ms-1. Read More »

A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?

The light ray bends towards normal. A light ray’s speed decreases and its direction bends toward the normal when it moves from an optically rarer medium with a low refractive index to an optically denser medium with a high refractive index.  As water is optically denser than air, a ray of light entering from air into water …

A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why? Read More »

Explain the nature of the image formed by the plane mirror.

Nature of images formed by a plane mirror: (i)The image formed is upright ( erect).(ii)The size of the image is equal to the size of the object. (iii)The image formed is laterally inverted.(iv)the image formed the same distance of an object from the mirror.(v)The focus of a plane mirror is at infinity. (vi) The image …

Explain the nature of the image formed by the plane mirror. Read More »