NCERT Class VIII Science Solutions: Chapter 16-Light Part 4

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SHORT ANSWER QUESTIONS

Question 14:

What happens to light when it gets dispersed? Give an example.

Answer:

Light is split into its constituent colours. Rainbow is an example

Question 15:

Draw Fig showing the position of the plane mirror. Also label the angle of incidence and angle of reflection on it.

As showing in fig is a angle of incidence (Q)

Angle of Incidence (Q)

As showing in fig is a angle of incidence (Q)

Answer:

As showing in fig is a angle of incidence (A)

Angle of Incidence (A)

As showing in fig is a angle of incidence (A)

Question 16:

Look at Fig. Can the image of the child in it be obtained on a screen?

As showing in fig is a the child in it be obtained on a screen

The Child in It Be Obtained on a Screen

As showing in fig is a the child in it be obtained on a screen

Answer:

No, the image of the child cannot be obtained on a screen

Question 17:

Eyes of the nocturnal birds have large cornea and a large pupil. How does this structure help them?

Answer:

A large pupil and large cornea allows more light to enter their eyes and they can see objects even in faint light.

Question 18:

What kind of lens is there in our eyes? Where does it form the image of an object?

Answer:

The type of lens in our eyes is convex. It forms images on the retina.

Question 19:

Which part of the eye gets affected if someone is suffering from cataract? How is it treated?

Answer:

In people suffering from cataract the eye lens becomes clouded. Cataract is treated by replacing the opaque lens with a new artificial lens