Refraction — Set 2

The formation of a mirage on a hot road is mainly due to?

Twinkling of stars is mainly caused by?

Which set of phenomena is involved in a rainbow formation?

When light is incident normally on a boundary, the refracted ray?

If refractive index of a medium is 1.5, what is the speed of light in it? (Take c = 3.0×10^8 m/s)?

Light of wavelength 600 nm in air enters glass of refractive index 1.6. What is its wavelength in glass?

Which statement about optical density is correct?

A ray passes through a rectangular glass slab with parallel faces. The emergent ray is?

In a glass slab, the lateral displacement increases mainly with?

At minimum deviation in a prism, which condition is true?