EASY
10th ICSE
IMPORTANT
Earn 100

Parallel light rays inclined at an angle of 15° to principal axis fall on the concave lens of focal length 15 cm. Draw a neat ray diagram to show the image formation. Also mention the properties of the image.

Important Questions on Refraction Through a Lens

EASY
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 5 - Refraction Through a Lens>QUESTIONS>Q 1
Define a lens.
MEDIUM
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 5 - Refraction Through a Lens>QUESTIONS>Q 6
Explain the lens action assuming it as a combination of frustum of prisms.
MEDIUM
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 5 - Refraction Through a Lens>QUESTIONS>Q 7

Complete the following diagrams and locate the position of the focus of lens in each case.

Question Image

EASY
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 5 - Refraction Through a Lens>QUESTIONS>Q 1
Define power of a lens.
EASY
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 5 - Refraction Through a Lens>QUESTIONS>Q 7
Visual angle of any object from naked eye is 2° and from magnifying glass is 20°. What is the magnifying power of the glass? 
MEDIUM
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 5 - Refraction Through a Lens>QUESTIONS>Q 8
An object of height 5 cm is placed in front of a convex lens that forms a virtual image of the object of height 15 cm. What is the magnification of the lens?
EASY
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 5 - Refraction Through a Lens>QUESTIONS>Q 9
Describe any method to find the focal length of a convex lens. Why this method cannot be used to find the focal length of a concave lens.
EASY
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 5 - Refraction Through a Lens>QUESTIONS>Q 14
The focal length of a convex lens and a concave mirror both is 20 cm. What would be the change in their focal lengths if the two are immersed in water?