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Examine the above figure and state which of the following option is correct? [one small box in the figure is equal to 1 cm]
(A) The mirror has a focal length of -6 cm and will produce an image of magnification +1.
(B) he mirror has a focal length of -3 cm and will produce an image of magnification -1.
(C) The mirror has a focal length of -3 cm and will produce an image of magnification +1.
(D) The mirror has a focal length of -6 cm and will produce an image of magnification -1.
Answer -
- Since the mirror used here is a concave mirror focal length is negative
- Now, each box is of 1 cm, so,
- Focal length = -3 cm
- And since image formed is inverted and of the same size, so magnification will be -1
So, the correct answer is (b)
