Practice Questions

Correct answer is Total internal reflection

working principle of Optical Fibre

What is the SI unit of Luminous Intensity?

Dispersion of light was discovered by

Light can travel in

Wave theory of light was proposed by

The twinkling of star is due to:

Refractive index of diamond

Colours that appear on the upper layer of oil spread on road is due to

Correct answer is Intensity of illumination

Lux is the SI unit of

Scattering of light occurs when particles in the air (smoke particles in this case) redirect the beam in various directions, making the light visible to the eye.
The Tyndall effect is the scattering of light by particles in a colloidal suspension, making the path of the light visible. 
It can be observed in examples such as sunlight passing through a dusty room, fog, or a mixture of milk and water

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