The relation between the speed of a wave (υ), wavelength and (λ) frequency (f) is ………

The number of waves leaving the source per second is called ………

Which of the following does not change due to refraction ?

Bright rainbow can be observed when the angle between incoming and outgoing light ray in a rain drop is ………

The red colour in a rainbow will be seen when the angle between a beam of sunlight and light sent back by a raindrop ………

The violet colour in a rainbow will be seen when the angle between a beam of sunlight and light sent back by a raindrop ………

If we look at the raindrops dispersing sunlight at an angle between 40° and 42° …………

The light dispersed by the rain drops appears as a bow because …………

Rainbow contains …………

Which one of the following phenomena of light are involved in the formation of a rainbow?

In prism experiment the i – d curve looks like …………

The splitting of white light into different colours is called …………

Light is a/an …………

What happens to refractive index of a medium when wavelength of incident light ray increases?

The reason for low angle of deviation for red colour in dispersion of light is due to its …………