College Physics
Solutions
College Physics
(a) What is the focal length of a magnifying glass that produces a magnification of 3.00 when held 5.00 cm from an object such as a rare coin? (b) Calculate the power of the magnifier in diopters. (c) Discuss how this power compares to those for store-bought reading glasses (typically 1.0 to 4.0 D).
Is the magnifier's power greater, and should it be?
(a)
To find the focal length of the magnifying glass that produces a magnification of
Given:
Object distance,
Formula used:
The formula for magnification is given by:
  
Where,
Calculation:
Substitute
  
The expression of thin lens formula is:
  
Where,
(b)
To find the power of the magnifying lens.
(c)
To discuss how this power compares to those store-bought reading glasses of power
Chapter 25 Solutions
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