Home
Class 12
PHYSICS
A spherical mirror forms an erect image ...

A spherical mirror forms an erect image three times the size of the object, If the distance between the object and the image is 80 cm. The nature and the focal length of the mirror are

A

concave, 30 cm

B

convex, 30cm

C

concave, 15 cm

D

convex,15 cm

Text Solution

Verified by Experts

The correct Answer is:
A
Magnified image is formed only by concave mirror, But this image may be real or virtual

For real image,
` 2x=80cm`
`:. x=40cm`
(1)/(-120)+(1)/(-40)=(1)/(f)`
Solving, we get `f=-30 cm` .
Similarly, we can check for virtual image.
Promotional Banner

Topper's Solved these Questions

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Exercise Level 1 Subjective|17 Videos

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Level 2 Single Correct|16 Videos

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Exercise Level 1 Assertion And Reason|10 Videos

  • RAY OPTICS

    DC PANDEY|Exercise Medical entrance gallary|76 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Level 2 Subjective|21 Videos

Similar Questions

Explore conceptually related problems

A spherical mirror forms a real image three times the linear size of the object. If the distance between the object and the image is 80 cm, the focal length of the mirror is

A lens of focal length 12 cm forms an upright image three times the size of a real object. Find the distance in cm between the object and image.

A concave mirror of focal length f produces a real image n times the size of the object. The distance of the object from the mirror is

Which spherical mirror forms a virtual, erect and smaller image of an object ?

A concave mirror of focal length f produces a real image n time the size of the object.What is the distance of the object from the mirror.

A concave mirror of focal length f produces a real image n times the size of the object. What is the distance of the object from the mirror?