Ray Optics Q2: Find Focal Length of Mirror

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SUMMARY

The discussion focuses on calculating the focal length of a mirror given a 2.0-cm tall object and a 1.0-cm tall upright image located 165 cm from the object. The initial attempt at solving the problem yielded an incorrect focal length of 37 cm. Participants are encouraged to clarify the equations used in their calculations to arrive at the correct focal length.

PREREQUISITES
  • Understanding of mirror equations, specifically the mirror formula: 1/f = 1/do + 1/di
  • Knowledge of magnification concepts in optics
  • Familiarity with the sign conventions for mirrors
  • Basic algebra skills for solving equations
NEXT STEPS
  • Study the mirror formula in detail to understand its application
  • Learn about the sign conventions for concave and convex mirrors
  • Explore the concept of magnification and its calculation
  • Practice solving problems involving focal lengths of mirrors
USEFUL FOR

Students studying optics, physics educators, and anyone preparing for exams involving mirror calculations.

sphouxay
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Homework Statement


A 2.0--cm tall object is placed in front of a mirror. A 1.0--cm tall upright image is formed behind the mirror, 165 cm from the object.

What is the focal length of the mirror?

Homework Equations





The Attempt at a Solution


I tried 37 cm, it was incorrect
 
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sphouxay said:

Homework Statement


A 2.0--cm tall object is placed in front of a mirror. A 1.0--cm tall upright image is formed behind the mirror, 165 cm from the object.

What is the focal length of the mirror?

Homework Equations





The Attempt at a Solution


I tried 37 cm, it was incorrect

Why did you try 37? What equations are you using?
 

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