A light ray traveling through air (n = 1) enters the kerosene (n = 1.44) floating on top of the water (1.33) in a container. It bends ___ the normal at the air-kerosene interface and ___ the normal at the kerosene-water interface.

A light ray traveling in glass (1.5) enters the water (n = 1.33). It bends ___ the normal.

When a light ray travels from air to water, it bends ____ the normal.

The incident ray is parallel to the emergent ray when the light ray ____.

A light ray bends towards the normal on entering a medium from the air. Which of the following can the second medium be?

A light ray enters a set of mediums placed one after the other and emerges out. The incident ray is ____ to the emergent ray.

A ray of light undergoes ______ when it encounters more than one transparent mediums placed one after the other.

The angle between the incident ray and the emergent ray for refraction through multiple mediums is ___ degrees.

The absolute refractive index of a medium is the ratio of the speed of light in the ____ and ____.

The refractive indices of water___ glass ___ air.

A light ray gets refracted from multiple transparent mediums with different refractive indices and, lastly, emerges out to the first medium. The incident ray is ____ the emergent ray.

During refraction through a glass slab, the incident ray is not parallel to ____.

• Incident and emergent ray are parallel in refraction through a glass slab.
• Incident ray can be parallel to normal line.

The incident ray is ____ to the refracted ray.

During normal incidence, the angle of incidence ___ the angle of refraction.

The unit of the refractive index is ___.