Question

A spherical mirror produces an image of magnification −1 on a screen placed at a distance of 40 cm from the mirror:
(i) Write the type of mirror.
(ii) What is the nature of the image formed?
(iii) How far is the object located from the mirror?
(iv) Draw the ray diagram to show the image formation in this case.

Answer 1

Explanation:

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Answer 2

Concave mirror

Explanation:

Given magnification is one, meaning the image is the same size as the object. It is not a plane mirror as it is specified that it is a spherical mirror.

1. So the mirror used should be a concave mirror.
2. In a concave mirror, you can get a real inverted image that is the same size as the object, when the object is placed at the centre of curvature C.
3. So the distance between the image and object is zero.
4. Focal length of the mirror = R/2 = 40/2 = -20 cm