What is light?

What is a light year?

What is unpolarised light? Explain the concept of unpolarised light.

What is polarisation of light?

What is an unpolarised light ?

What is velocity of light in vaccum ?

What is plane polarised light ?

Answer the following questions: What is divergence of light? Where is it used?

What do you mean by polarisation of light ? How will you distinguish between polarised and non polarised light ?

Light passes through glass of refractive index 1.5 . What is the time required for light to travel 4 xx 10^(8) m in glass ?

What is visible light?