Homework Help: physics

Posted by Tom on Friday, November 2, 2012 at 12:11pm.

For a glass lens submerged in water (n=1.33), the critical angle of incidence at which total internal reflection begins to happen is 60.1 degrees. What is the index of refraction of the glass?

physics - Elena, Saturday, November 3, 2012 at 5:10am
sin θ= n(water)/n(glass)
n(glass)= n(water)/ sin θ=1.33/sin60.1=1.53

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