An overhead projector lens is 32.0 cm from a slide (the object) and has a focal length of 30.1 cm. What is the magnification of the image? (Unit=cm) PLS HELP

M = 14.3

Explanation:

Given the following :

Object distance (u) = 32cm

Focal length (f) = 30.1 cm

Magnification = image distance (v) / object distance (u)

Recall ; 1/f = 1/u + 1/v

1/30.1 = 1/32 + 1/v

1/v = 1/30.1 - 1/32

1/v = (32 - 30.1) / 963.2

1/v = 2.1 / 963.2

1/v = 0.0021802

v = 1/0.0021802

v = 458.66666 cm

Therefore, Magnification 'M' = v / u

M = 458.66666 / 32

M = 14.333333

M = 14.3

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