Is it possible to solve this problem without their index of refraction

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Homework Help Overview

The discussion revolves around a problem in optics, specifically concerning the refraction of light as it passes from one medium to another. The original poster presents a scenario where light strikes a transparent material at a specific angle of incidence, and they inquire about the possibility of determining the speed of light in the material without knowing its index of refraction.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the application of Snell's law and question whether it is feasible to solve the problem without the index of refraction. There is also a consideration of whether to assume equal indices of refraction for both materials involved, given the angles provided.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem. Some have suggested using Snell's law, while others are questioning the assumptions regarding the indices of refraction and the implications of the angles provided.

Contextual Notes

There is a lack of information regarding the index of refraction for the transparent material, which is central to the problem. Participants are also considering the assumption that the light originates from air or vacuum.

jsalapide
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Light strikes the surface of a transparent material at an angle of incidence of 30. If the refracted angle in the transparent material is 20, what is the speed of light in the material?

Is it possible to solve this problem without their index of refraction?
If possible, how?
 
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Use Snell's law.
 


I've used it before, but the index of refraction is not given. Should I assume that the index of both material are equal?
 


jsalapide said:
I've used it before, but the index of refraction is not given.
But the angles are given.
Should I assume that the index of both material are equal?
If the indices were equal, could the angles be different? One thing I would assume is that the light striking the material starts out in air/vacuum.
 

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