An object is 20 cm away from a concave mirror and it iswithin the focal length of the mirror. If the mirror is changedto a plane mirror, the image moves 15 cm closer to the mirror.Focal length of the concave mirror is -

Open in App

Solution

Suggest Corrections

Similar questions

Q. A plane mirror and concave mirror are

50 c m

apart. An object is

30 c m

from a concave mirror such that image of the two coincide. The focal length of the concave mirror is

Q. The focal length of a concave mirror is

20

cm. An object is placed at distance

20

cm from mirror. Its image will be formed

A concave mirror forms an image of 20 cm high object on a screen placed 5.0 m away from the mirror. The height of the image is 50 cm. Find the focal length of the mirror and the distance between the mirror and the object.

Q. A concave mirror of focal length

10 c m

and convex mirror of focal length

15 c m

are placed facing each other

40 c m

apart. A point object is placed between the mirrors on their common axis and

15 c m

from the concave mirror. One of the images is produced by the reflection first at concave mirror and then at convex mirror. The distance of this image from convex mirror is

Q. An object of height

1.5 c m

is situated at a distance of

15 c m

from a concave mirror. The concave mirror forms its real image of height

3.0 c m

. The focal length of concave mirror will be :

Join BYJU'S Learning Program