Focal Length of a Plane Glass: How to Measure and Understand Its Infinite Power

AI Thread Summary
The focal length of a plane glass is considered to be infinite, which corresponds to a power of zero. This conclusion arises from the behavior of light passing through a plane surface, where it does not converge or diverge. The discussion emphasizes the importance of articulating the methodology used to reach such conclusions, as it aids in understanding the problem better. Participants encourage thoughtful engagement rather than just calculations. Overall, the focal length of a plane glass serves as a fundamental concept in optics.
hafiz ns
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Homework Statement


what is the focal length of a plane glass ?

Homework Equations

The Attempt at a Solution


place a plane glass in a plane and allow light to pass through it measure its focal length
(i think its focal length is infinite )
 
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Hello Hafiz, and welcome to PF.
This is homework of the kind that let's you think instead of calculate. You think its infinite, which is more or less a result. How do you come to this conclusion ?
 
You are correct Hafiz, the focal length of a plane mirror is near to infinite. That's why we say that the power of ZERO.
But we encourage you to write the methodology of deriving solution while posting a question. It help other a lot to understand the correct question.
 
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