Distinguish between converging and diverging lenses.

Important Questions on Refraction and Dispersion of Light

MEDIUM

8th CBSE

IMPORTANT

Living Science 8>Chapter 16 - Refraction and Dispersion of Light>EXERCISES>Q D

Why does a concave lens always form a virtual image of an object? Draw a diagram to illustrate this.

EASY

8th CBSE

IMPORTANT

Living Science 8>Chapter 16 - Refraction and Dispersion of Light>EXERCISES>Q D

 What do you mean by the accommodation of the eye? What gives the eye the power of accommodation?

EASY

8th CBSE

IMPORTANT

Living Science 8>Chapter 16 - Refraction and Dispersion of Light>EXERCISES>Q D

How are letters written in the Braille system? Give two examples.

EASY

8th CBSE

IMPORTANT

Living Science 8>Chapter 16 - Refraction and Dispersion of Light>EXERCISES>Q D

What is meant by 'persistence of vision'? How is this property of the eye used in movie films?

HARD

8th CBSE

IMPORTANT

Living Science 8>Chapter 16 - Refraction and Dispersion of Light>EXERCISES>Q E

A coin kept at the bottom of a glass bowl full of water appears to be higher than it actually is. With the help of a labelled diagram, explain why this happens.

HARD

8th CBSE

IMPORTANT

Living Science 8>Chapter 16 - Refraction and Dispersion of Light>EXERCISES>Q E

As an object is slowly brought from infinity to the focus of a convex lens, the image travels from the focus to infinity.' Show this with the help of diagrams with five different positions of the object.

HARD

8th CBSE

IMPORTANT

Living Science 8>Chapter 16 - Refraction and Dispersion of Light>EXERCISES>Q E

Distinguish between myopia and hypermetropia. Draw diagrams to show how these defects can be corrected by using suitable lenses.

EASY

8th CBSE

IMPORTANT

Living Science 8>Chapter 16 - Refraction and Dispersion of Light>EXERCISES>Q 1

Can a glass slab bend different coloured lights by different amounts?