Question

We wish to obtain an erect image of an object, using a concave mirror of focal length 15cm.what should be the range of distance of the object from the mirror? what is the nature of the image? is the image larger or smaller than the object? draw a ray diagram to show the image formation in this case.

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Answer 1

Answer:

Object distance should be less than the focal length for the formation of an erect image. Hence, the range of distance of object from the mirror should be less than 15 cm i.e. from 0 to 15 cm in the front of mirror from the pole. The nature of image so formed will be virtual and erect. The size of the image will be larger than object. Ray diagram is attached as image to the question.

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Answer 2

Here the focal length of concave mirror is 15 cm. To obtain an erect image of an object with a concave mirror. The object should be placed between the pole and focus i.e. within 15 cm from the pole of the mirror.