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

Which of the following statements is correct regarding the propagation of light of diferent colours of white light in air?

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

The sun appears red at sunset or sunrise. Choose the incorrect statement from the following

A student traces the path of a ray of light through a triangular glass prism for diferent values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?

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

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

The sky appears black to an astronaut

Myopia can be corrected by using

Rainbow is caused due to

The sky appears black to an astronaut as there is no

The refractive index of glass is least for

The refractive index of glass is largest for