Question

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

Solution

Given,
Radius of curvature, R = 20 cm

Relationship between radius and focal length is as :

Focal length = $\frac{1}{2} \times Radius of curvature$

$\Rightarrow$ $f = \frac{20}{2} = 10 cm$ is the focal length of the mirror.

Some More Questions From Acids, Bases and Salts Chapter

Give three points of differences between real and virtual images.

What is a mirror? Mention the different types of mirrors commonly used.

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Acids, Bases And Salts

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

Some More Questions From Acids, Bases and Salts Chapter

Give three points of differences between real and virtual images.

What is a mirror? Mention the different types of mirrors commonly used.

Define the following terms in connection with reflection of light:
Incident ray, reflected ray, point of incidence, normal, angle of incidence and angle of reflection.

State the laws of reflection of light.

Are the laws of reflection applicable to plane surfaces also valid for curved surfaces?

State the important properties of images formed by plane mirrors.

What is lateral inversion of an image ? What is the cause of lateral inversion?

What is a spherical mirror? What are the two different types of spherical mirrors?

Define the following terms in connection with spherical mirrors:
(i) Pole (ii) Centre of curvature (iii) Radius of curvature (iv) Principal axis (v) Linear aperture (vi) Angular aperture (vii) Principle focus (viii) Focal length (ix) Focal plane.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

WhatsApp Group

Download Android App

Ncert Book Download

Acids, Bases And Salts

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

Some More Questions From Acids, Bases and Salts Chapter

Give three points of differences between real and virtual images.

What is a mirror? Mention the different types of mirrors commonly used.

Define the following terms in connection with reflection of light:Incident ray, reflected ray, point of incidence, normal, angle of incidence and angle of reflection.

State the laws of reflection of light.

Are the laws of reflection applicable to plane surfaces also valid for curved surfaces?

State the important properties of images formed by plane mirrors.

What is lateral inversion of an image ? What is the cause of lateral inversion?

What is a spherical mirror? What are the two different types of spherical mirrors?

Define the following terms in connection with spherical mirrors:(i) Pole (ii) Centre of curvature (iii) Radius of curvature (iv) Principal axis (v) Linear aperture (vi) Angular aperture (vii) Principle focus (viii) Focal length (ix) Focal plane.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Define the following terms in connection with reflection of light:
Incident ray, reflected ray, point of incidence, normal, angle of incidence and angle of reflection.

Define the following terms in connection with spherical mirrors:
(i) Pole (ii) Centre of curvature (iii) Radius of curvature (iv) Principal axis (v) Linear aperture (vi) Angular aperture (vii) Principle focus (viii) Focal length (ix) Focal plane.