Science : Ch 11 – The Human Eye and the Colourful World

The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light:

Which of the following phenomena contributes signifcantly to the reddish appearance of the sun at sunrise or sunset?

The bluish colour of water in deep sea is due to:

In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray

Ankit remarked that he has seen wavering of objects when seen through a stream of hot air rising above a tandoor or a fire. He said that the air just above the fire becomes hotter than the air further higher up. He further said that this wavering can also be seen in the earth’s atmosphere as the earth’s atmosphere is not evenly distributed and several observations can be explained on the basis of this phenomenon,name the phenomeoneon

What would have been the colour of sky if the earth had no atmosphere

Milk is a colloid that contains globules of fat and protein. When a beam of light is directed at a glass of milk the light is scattered. That is a great example

Power of a lens is

Effect produced by scattering of light by the atmosphere.

Light which consists of only one colour or single wavelength is called Monochromatic

Astigmatism can be corrected

The emergent ray in a prism bend at an angle to the direction of the

Visible spectrum is the band of coloured components of a

The refractive index of glass is least for

The refractive index of glass is largest for