A lens is thicker in the middle than at the edges. Can it be used to burn a piece of paper by using sunlight?

Important Questions on Light

MEDIUM

7th CBSE

IMPORTANT

Living Science 7>Chapter 16 - Light>ORAL QUESTIONS>Q 2

If all rays falling on a concave lens are parallel to the principal axis of the lens, what happens to them after they pass through the lens?

MEDIUM

7th CBSE

IMPORTANT

Living Science 7>Chapter 16 - Light>ORAL QUESTIONS>Q 3

If all rays falling on a convex lens are parallel to the principal axis of the lens, what happens to them after they pass through the lens?

MEDIUM

7th CBSE

IMPORTANT

Living Science 7>Chapter 16 - Light>ORAL QUESTIONS>Q 4

There is only one point on a concave or convex lens, a ray passing through which is not deviated at all. Where does this point lie and what is it called?

MEDIUM

7th CBSE

IMPORTANT

Living Science 7>Chapter 16 - Light>ORAL QUESTIONS>Q 5

A lens is found to form both real and virtual images of an object, depending on the position of the object with respect to the lens. What kind of lens is it- convex or concave?

EASY

7th CBSE

IMPORTANT

Living Science 7>Chapter 16 - Light>ORAL QUESTIONS>Q 6

Sunlight consists of light of only one colour. Do you agree? Give reasons

MEDIUM

7th CBSE

IMPORTANT

Living Science 7>Chapter 16 - Light>EXERCISES>Q A

The image formed by a plane mirror is :

EASY

7th CBSE