# Optics and Magnification on Objects

Please help with 48, 56, 62, 72, 86 ONLY

48) What is the magnification of the object when the object is 35 cm from the lens (see attachment please)

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Please see attached file

Practice questions

Do 48, 56, 62, 72, 86 ONLY

The lens equation is given as:

, where p = object distance, q = image distance

From the graph, at p = 10 cm, M = 0.6 (approx)

Therefore, 0.6 = -q/10, which gives q = -6 cm

Therefore,

Therefore, f = -15 cm.

Now, at p = 35 cm,

, therefore, q = -21/2 = -10.5 cm

Hence M = -q/p = 10.5/35 = 0.3. ...

#### Solution Summary

The optics and magnifications on objects are examined.

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