MEDIUM
12th ICSE
IMPORTANT
Earn 100

Draw ray diagram to illustrate the formation of a real image after refraction of light at an air-glass spherical surface.

Important Questions on Refraction of Light at Spherical Surfaces : Lenses

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 3 - Refraction of Light at Spherical Surfaces : Lenses>QUESTIONS>Q 2
What is meant by the optical centre of a lens?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 3 - Refraction of Light at Spherical Surfaces : Lenses>QUESTIONS>Q 3

Explain the meaning of the first and the second focus of a convex lens, drawing separate ray-diagrams.

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 3 - Refraction of Light at Spherical Surfaces : Lenses>QUESTIONS>Q 4

Define the first focus of a concave lens, giving a suitable ray-diagram.

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 3 - Refraction of Light at Spherical Surfaces : Lenses>QUESTIONS>Q 5
What is meant by the focal length of a concave lens?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 3 - Refraction of Light at Spherical Surfaces : Lenses>QUESTIONS>Q 6
On what factors does the focal length of a lens depend?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 3 - Refraction of Light at Spherical Surfaces : Lenses>QUESTIONS>Q 7

A lens is made of two different materials of refractive indices n1 and n2, as shown. A point object is placed on the principal axis. How many images of the object will be formed by the lens (neglecting spherical and chromatic aberration)?

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EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 3 - Refraction of Light at Spherical Surfaces : Lenses>QUESTIONS>Q 8
How does the focal length of a lens depend on the wavelength of incident light? Of a mirror?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 3 - Refraction of Light at Spherical Surfaces : Lenses>QUESTIONS>Q 9
What are the two focal length of a lens? Are they equal?