Solving Refraction: Critical Angle & Min. Angle of Incidence

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Homework Help Overview

The discussion revolves around a problem involving the refraction of light as it passes from air into a block of ice, specifically focusing on calculating the critical angle and the minimum angle of incidence required for light to be refracted out of the block. The refractive index provided is 1.3.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the calculation of the critical angle and question the correctness of the initial attempt. There is a request for clarification regarding the minimum angle of incidence and the necessity of a diagram to aid understanding.

Discussion Status

Some participants confirm the correctness of the critical angle calculation while seeking further clarification on the second part of the problem. A diagram has been mentioned as potentially helpful, and there is an exploration of the interpretation of the phrase "any point" in the context of the problem.

Contextual Notes

There is a mention of constraints regarding file formats for diagrams, as some participants can only view JPEG images. Additionally, there is a suggestion to clarify the wording of the problem statement regarding the minimum angle of incidence.

max1995
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Homework Statement


Light traveling thorugh air is at incident at point x on the block of ice. If the refractive index is 1.3, calculate
a) the critical angle at the ice-air interface (3 marks)
b) the minimum angle of incidence, for the light to Y refracted out of the block at any point along the top surface (7 marks)

Homework Equations

The Attempt at a Solution


a) sin(θc)=1/nm
θ= sin-1(1/1.3)
θ= 50.3 (1 d.p)

is this right?

b) Need help on this one
 
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(a) is right.

For (b) there's a diagram to accompany it?
 
NascentOxygen said:
(a) is right.

For (b) there's a diagram to accompany it?

yep it is in the file i uploaded
 

Attachments

thank you for helping btw :)
 
I can view only jpegs, sorry.
 
NascentOxygen said:
I can view only jpegs, sorry.
Managed to turn it into jpeg
 

Attachments

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I was anticipating there'd be a point Y. I find there is not.

Perhaps you meant to type
b) the minimum angle of incidence, for light to be refracted out of the block at any point along the top surface[/color]?

If so, start by drawing a large diagram with all straight lines (e.g., by using a ruler).

By "any point" I think they don't mean "every point", just at least some point.
 

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