Question

write the caresion sign convention for spherical mirrors. Size of an object formed by a mirror having a focal length of 20cm is observed to be reduced to 1/3rd of its size. at what distance the object has been paced from the mirror? what is the nature of the image and the mirror?​

Answer 1

Answer:

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An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm. Determine the ratio of the size of the image and the size of object.

Since, object is always placed in front of the mirror hence object distance is taken as negative. Since, the centre of curvature and focus lie in front

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Answer 2

Answer:

An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm. Determine the ratio of the size of the image and the size of object.

An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm. Determine the ratio of the size of the image and the size of object.Since, object is always placed in front of the mirror hence object distance is taken as negative. Since, the centre of curvature and focus lie in front