While studying physics at the library late one night, you notice the image of the desk lamp reflected from the varnished tabletop. When you turn your Polaroid sunglasses sideways, the reflected image disappears.
If this occurs when the angle between the incident and reflected rays is 110 degrees, what is the index of refraction of the varnish?
tan theta = n2/n1
The Attempt at a Solution
I used n2 = air (1) and solved for n1 but was incorrect. Where am I going wrong?