Explain the statement, "Light added to light can produce darkness.".

Polarised light can be produced by

Explain the effect of light on growth and distribution of plants.

When two light waves interfere at same point to produce darkness, what becomes of the light energy?

A prism can produce spectrum of white light but a glass slab having the same material as prism cannot produce any spectrum. Why?

State and explain the phenomenon of refraction of light with examples.

can we get interference using white light?

What do you understand by the statement 'Light from the sun is unpolarised'? Explain how does sunlight get polarized by the process of scattering.