Define the first principal focus of a convex lens.

Important Questions on Light - Reflection and Refraction

EASY

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>IMPORTANT QUESTIONS>Q 19

Define the focal length of a lens.

EASY

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>IMPORTANT QUESTIONS>Q 20

What do you understand by the term ‘power of lens’?

EASY

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>IMPORTANT QUESTIONS>Q 21

Give two characteristics of the image formed by a concave lens.

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>IMPORTANT QUESTIONS>Q 22

State two applications of a convex lens.

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>IMPORTANT QUESTIONS>Q 23

The size of an object is $3 \mathrm{cm}$. The magnification produced by a mirror is $+1$. What is the size of the image?

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>IMPORTANT QUESTIONS>Q 24

An object $1 \mathrm{cm}$ high produces a real image $1.5 \mathrm{cm}$ high, when placed at a distance $12 \mathrm{cm}$ from a concave mirror. Calculate the position of the image.

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>IMPORTANT QUESTIONS>Q 25

An object is placed $12 \mathrm{cm}$ from a concave mirror which forms its real image at a distance $18 \mathrm{cm}$. Calculate the focal length of the mirror.

HARD

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>IMPORTANT QUESTIONS>Q 26

A pond depth of $24 \mathrm{cm}$ is filled with water of refractive index $4/3$. Calculate apparent depth of the tank when view normally.