Law of refraction help?

Question

can you please tell me where will i put the angle when the question told me like this :

...A light beam strikes the top surface of the liquid at an angle of 42.5 degrees from the normal...

the question states that the beaker with mirrorred bottom is filled with a liquid.

should the angle 42.5 be adjacent to the normal line of the refracted angle???

Answer 1

Try the physics forum