Question

An object is placed at a distance of 30cm in front of a concave mirror of
focal length 10cm.Calculate the distance of the image from the mirror?
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Answer 1

Answer:

15cm

Explanation:

1 / 30 + 1 / x = 1 / 10

x + 30 = 3x

x = 15 cm (distance from mirror to image)

(I'm not sure if this is correct because I haven't learned much around this topic so you might want to double check :D )