MEDIUM
10th ICSE
IMPORTANT
Earn 100

Draw a ray diagram to show how a converging lens can form an image of the Sun. Hence, give a reason for the term 'burning glass' for a converging lens used in this manner. 

Important Questions on Refraction Through a Lens

MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(B)>Q 25
Give two characteristics of the image formed by a concave lens.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(B)>Q 26
Give two characteristics of the virtual image formed by a convex lens.
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(B)>Q 28
Complete the following table.
Type of lens Position of object Nature of image Size of image
convex Between optic centre and focus    
convex At focus    
concave At infinity    
concave At any distance    
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(B)>Q 32
A concave lens, if kept at a proper distance from an object, can form its real image.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(C)>Q 1
Define ‘power’ of a lens. In what unit is it expressed?
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(C)>Q 2
How is the power of a lens related to its focal length?
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(C)>Q 3
How does the power of a lens change if its focal length is doubled ? 
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(C)>Q 4
How is the sign (+ / -) of power of a lens related to its divergent or convergent action?