Q. 75

Expert-verifiedFound in: Page 993

Book edition
4th

Author(s)
Randall D. Knight

Pages
1240 pages

ISBN
9780133942651

A lens placed in front of an object creates an upright image twice the height of the object. The lens is then moved along the optical axis until it creates an inverted image twice the height of the object. How far did the lens move?

The lens will move .

We have given,

object distance from the lens = ,

image height = ,

image formed = upright.

We have to find how far did the lens move to obtain the inverted image.

Magnification of the lens

We know that for a lens to get an upright image that is 2 times magnified, the object is between the lens and the focal point.

lens equation

After the lens has moved:

Using lens equation:

then, lens has moved=

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