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

At noon, the Sun looks white as:

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

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

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

Arjun 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 ,Name two observations which can be explained by the above phenomenon.

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

When a fine beam of sunlight enters a smoke filled room, smoke particles become visible due to scattering of light by these particles

The splitting of light into its component colours is called

The sky appears black to an astronaut

The density of the atmosphere, as we know goes on decreasing as the distance above the sea level increases,this phenomeneon is called

The defect in a person can see nearby objects but not far away objects

A concave lens of short focal length has greater

The sky appears black to an astronaut as there is no

The refractive index of glass is largest for