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Course: Bridge Course Class 12th Physics > Unit 1

Lesson 3: Lens formula and Power
Science
Bridge Course Class 12th Physics
Ray optics
Lens formula and Power
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Mix questions on Lens formula and Magnification + questions on Power of lens

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Problem

A lens maker is inspecting a convex lens of focal length 10 cm by placing an object at a distance of 15 cm from the lens.
What is the magnification, m, of the image produced by the lens?
Note: Let's write the answer with the correct sign.
m=
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi