While determining the focal length of a concave mirror, a student obtained the image of a distant object on a screen. In order to get the focal length of the mirror, the student should measure the distance:
(1) between the object and the mirror only
(2) between the screen and the mirror only
(3) between the object and the screen only
(4) between the screen and mirror as well as between the screen and the object

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Solution

If a student obtains an image of a distant object through a concave mirror on the screen then the distance between the mirror and the screen would simply be the focal length of the concave mirror, as the concave mirror converges all the rays coming from infinity on its focus.

Hence, the correct answer is option 2.

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Similar questions

The image of a distant object is obtained on a screen by using a concave mirror. the focal length of the mirror can be determined by measuring the distant between

A) the object and the mirror

B) the object and the screen

C) the mirror and the screen

D) the mirror and the screen as well as the between the object and the screen

To determine focal length of a concave mirror a student obtains the image of a well lit distant object on a screen. To determine the focal length of the given concave mirror he needs to measure the distance between:

Q. The image of a distant object is obtained on a screen by using a concave mirror. The focal length of the mirror can be determined by measuring the distance between :

Q. A sharp image of a distant object is obtained on a screen by using a convex lens. In order to determine the focal length of the lens, you need to measure the distance between the :
(1) lens and the object
(2) lens and the screen
(3) object and the screen
(4) lens and the screen and also between object and the screen

Q. While determining focal length of given concave mirror by focusing a distant object on the screen you always get in the begi nnind a blurred image on the screen . In order to obtain a sharp image on the screen in which direction we have to move the mirror?

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