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2 years ago

A 3.0 cm object is 12.0 cm from a convex mirror that has a focal length of 20.0 cm.

Physics

2 answers:

poizon [28]2 years ago

7 0

Given conditions for question 2:

height of object = 3.0 cm

distance of object from mirror = 12 cm

focus length = 20 cm

image distance = ?

Using mirror formula:

1/(focus length) = 1/(object distance) + 1/(image distance)

or, 1/20 = 1/12 + 1/(image distance)

or, image distance = -30cm (the image formed is a virtual image)

Also, magnification of image is:

image height /height of object<span> = - image distance </span>/object distance

or, image height = - image distance / object distance * height of object

or, image height = -(-30) / 12 * 3 = 7.5

user100 [1]2 years ago

3 0

Distance of the image from the mirror: -30

Height of the image: 7.5

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