Please Help me! I really don't know what to do for this question. Well I know what process and formulas to use but I'm not sure whether the blue light travels from the air to the plane of glass OR from the pane of glass to the air. It is very unclear to me. Please put a step by step process so I can understand the question itself.

***Please do Question 2 ONLY***

1. Sunlight strikes the surface of a lake at an angle of 40. At what angle with respect to the normal would a fish see the sun? The index of refraction of water is 1.33. (/2) 2. In air, a beam of blue light has a wavelength of 400 nm. The blue light is incident on a pane of glass that has an index of refraction of 1.52. The angle of incidence of the light is 35. Determine the angle of refraction, the wavelength and frequency of the light when it is in glass, and the critical angle for the glass-air interface. (/4) 3. The triangular face of a prism is an equilateral triangle. White light is directed at the side of the prism such that 0 = 50.0. The prism is made of crown glass. Its index of refraction ranges from 1.517 for the longest visible wavelengths to 1.538 for the shortest. Find the range of refraction angles for the light transmitted into air as the light leaves side BC. ( /4)