+91-8076753736 support@wiredfaculty.com
Wired Faculty Logo
Wired Faculty Logo Wired Faculty

Sponsor Area

Acids, Bases And Salts

Question
CBSEENSC10012774
Wired Faculty App

A concave mirror produces three times enlarged image of an object placed at 10 cm infront of it. Calculate the radius of curvature of the mirror.

Solution
Given, a concave mirror. 

The image formed in front of the concave mirror is real, so magnification is negative. 

Magnification,  m = -3
Object distance, u = - 10 cm
As,  m = -vu  

we have,
                -3  = -v-10     v = -30 cm 
               
By mirror formula, 

                 1f =1u+1v       = 1-10+1-30       = -430 

                    f = -304  = - 7.5 cm 

Therefore,

Radius of curvature, R = 2f
                                  = 2 x (-7.5)
                                  = -15 cm
 

Some More Questions From Acids, Bases and Salts Chapter

What is an optical medium? How can we classify different media on the basis of their behaviour towards light?

What do you mean by reflection, refraction and absorption of light?

Which type of phenomenon (reflection or refraction) occurs when light falls on (i) a highly polished surface like a mirror and (ii) a transparent medium like glass or water?

What is meant by the optical image of an object?

What are real and virtual images? Can these images be obtained on a screen? Give reasons in support of your answer.

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?

Sponsor Area

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation