Refractive index and speed of light

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Homework Help Overview

The problem involves determining the speed of light in a glass slab with a given refractive index of 1.3. The subject area pertains to optics and the properties of light as it travels through different media.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the appropriate equations related to the refractive index and question the relevance of the original poster's equation involving angles. There is a suggestion to consider the fundamental definition of the refractive index.

Discussion Status

Some participants have provided hints regarding the correct approach to find the speed of light in the medium, while others have pointed out potential misunderstandings in the original poster's attempt. The discussion is ongoing with various interpretations being explored.

Contextual Notes

There is a mention that the question may be from a previous semester, which could imply constraints related to the homework guidelines or expectations for the current discussion.

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Homework Statement



A slab of glass has a refractive index of 1.3. What will be the speed of light in this glass?

Homework Equations





The Attempt at a Solution



[tex]\frac{sin i}{sin r}=1.3[/tex]

?
 
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Wrong equation. If you knew what this equation was, youwould know that you can't use it. The "i" and "r" are referring to angles, and are any angles given?

Try the equation that defines the index of refraction, n .
 
light speed in the media = c/n
 
Welcome to Physics Forums scivet!

We try to give hints to people, rather than giving the answer, when it's a homework question.

But since the question is from last semester, no harm done!
 

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