Physics Sample Test

Light has ........ nature.

• particle

• wave

• both particle and wave

• none of these

........ wave can travel through vacuum.

• Light

• Sound

• Water

• Gas

The refractive index of glass is....... than that of air.

• greater

• smaller

• equal

• half

For refraction to take place ......... optical media are required.

• one

• two

• three

• none

When light entre from air to glass, the velocity of light ....... .

• constant

• increase

• decrease

• unchange

The angle of incidence and angle of refraction are in the same ........ .

• medium

• plane

• place

• point

Electromagnetic wave travel ....... .

• water

• glass

• vacuum

• all of these

The ........ is called Snell's law

• first

• second

• third

• four

When a drop of ink at the bottom of a glass slab 6cm thick is viewed from above, it is seen at a spot 1.67cm above the bottom. Find the refractive index of glass.

• 1.3857

• 1.9857

• 1.8857

• 1.7857

If the velocity of light in a medium is 2.3x10⁸ ms^-1 , find the refractive index of the medium.

• 1.304

• 0.304

• 2.304

• 3.304