The width of a plane incident wavefront is found to be doubled in a denser medium.If it makes an angle of `70^@` with the surface, calculate the refractive index for the denser medium.

A plane wavefront is made incident at an angle of 30^@ on the surface of the glass . Calculate the angle of refraction if refractive index of glass is 1.5 .

When a plane wavefront is incident on a double convex lens, the refracted wavefront is

A ray of light travelling through air is incident on the surface of water in a lake . If the ray is inclined at 30^@ with the surface and if the refractive index of water is 4/3 then the angle through which the ray deviates is

A ray of light is incident on a glass slab making an angle of 30^@ with the surface. The angle of refraction in glass, if the refractive index of flass is 1.6 , is

When a ray of light passes from air to denser medium, its speed is reduced by 30%. What is the refractive index of the medium?

When a ray of light passes from air to denser medium, its speed is reduced by 30%. What is the refractive index of the medium

The speed of light in a medium is 2.25 xx 10^(8) m//s . Calculate absolute refractive index of the medium.

A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is mu , then the angle of incidence is nearly equal to:

A ray is ihncident at an angle of incidence ii on one surface of a prism of small angle A and emerge normally from opposite surface. If the refractive index of the material of prism is mu. the angel of incidance I is nearly equal to

Read the statements given below and identify the concepts explained in them. When the light source is kept in an optically denser medium, name the incident angle for which the refracting ray grazes along the surface of the medium.