QUESTION 1 2 points Save Answer An optical ray traveling in air approaches an equilateral glass triangle, as shown in the picture associated with this prelab (find it as a separate file in the “prelabs” folder!). The angle of incidence is 76 degrees. Using Snell’s Law of refraction, find the exit angle of the ray from the glass on the other side. Define the exit angle, like the incidence angle, relative to the normal. Assume the index of refraction is 1.53. Hint: sketch the path the ray will take. You’ll have to use Snell’s Law twice for this problem, and you’ll have to use some geometry to figure out how the angle from the first refraction is related to the angle going into the second refraction. (Hint: the sum of all the angles in a triangle is 180 degrees.) 1 points Save Answer QUESTION 2 How can you use a distant object to quickly make an estimate of the focal length of a converging lens? Use an equation to justify your answer. T T T F Paragraph + Arial 3 (12pt) = – E – T – – 40 i 53 a % DO Qin a = = = = = = T* TCES – – – – 5 – O f, Mashups – 1 « © @ £ # # # # # #EE E DO ATAL CSS