When a ray of light travels from one medium to another, it bends. This phenomenon is called.

(a)

reflection

(b)

dispersion

(c)

refraction

(d)

interference

The splitting up of white light into colours is called

(a)

reflection

(b)

refraction

(c)

scattering

(d)

dispersion

On a rainy day, small oily films on water show brilliant colours. This is due to

(a)

scattering

(b)

dispersion

(c)

reflection

(d)

refraction

Rainbow formation is due to _____ water droplets.

(a)

Ionisation

(b)

absorption of sunlight

(c)

reflection and refraction of sunlight

(d)

reflection of sunlight

Red light is used in traffic signals because

(a)

It has highest wavelength

(b)

disperses least

(c)

red is symbol of danger

(d)

both a & b