isaac physics light problem (air sandwich)

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harpatel3
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Report Thread starter 4 weeks ago
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I have been stuck on this problem for the last 2 days. I've completed part A but i keep getting the same 2/3 incorrect answers for part B.

https://isaacphysics.org/questions/air_sandwich_sym (link to Q)

i have got that PSR= 2d/cos(x)
and used trig to find what i thought was the length PQ of:
2d*sin(x)tan(x)/n
and its expanded form.

where x= theta

Any hints of where i may have gone wrong or things to try are appreciated

Thanks!
Last edited by harpatel3; 4 weeks ago
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Eimmanuel
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Report 1 week ago
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(Original post by harpatel3)
I have been stuck on this problem for the last 2 days. I've completed part A but i keep getting the same 2/3 incorrect answers for part B.

https://isaacphysics.org/questions/air_sandwich_sym (link to Q)

i have got that PSR= 2d/cos(x)
and used trig to find what i thought was the length PQ of:
2d*sin(x)tan(x)/n
and its expanded form.

where x= theta

Any hints of where i may have gone wrong or things to try are appreciated

Thanks!
If help is still needed, see below.
I don't see any wrong with the answer 2d*sin(x)tan(x)/n.
Did you type the expression correctly?
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