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Snell's Law and critical angle

  • Thread starter xswtxoj
  • Start date
  • #1
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Homework Statement



The critical angle of a certain plastic in air is 37.3 degrees. Wats the critical angle of the same plastic if its immersed in water?

Homework Equations



n1sin( theta)= n2sin(theta)

The Attempt at a Solution


Nair= 1.00
1.00sin37.3/1.33 = sin(theta)
sin(theta)= .455
inverse sin (theta) = 27.1 degrees


Is that right?
 

Answers and Replies

  • #2
No. I think it should be:
<< complete solution deleted by berkeman >>
 
Last edited by a moderator:
  • #3
berkeman
Mentor
56,649
6,551
No. I think it should be:
<< complete solution deleted by berkeman >>
Please do not post complete solutions to homework/coursework questions. Instead, provide hints and tutorial advice. The original poster (OP) must do the buld of the work. The Rules link at the top of the page explains how we treat homework here on the PF.
 
  • #4
rl.bhat
Homework Helper
4,433
5

Homework Statement



The critical angle of a certain plastic in air is 37.3 degrees. Wats the critical angle of the same plastic if its immersed in water?

Homework Equations



n1sin( theta)= n2sin(theta)

The Attempt at a Solution


Nair= 1.00
1.00sin37.3/1.33 = sin(theta)
sin(theta)= .455
inverse sin (theta) = 27.1 degrees


Is that right?
No.
What is the relation between the refractive index and the critical angle?
Find the refractive index of the plastic.
 

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