Find αmax, the largest value of the angle α such that no light is refracted out of the prism at face AC if the prism is immersed in air. Express your answer in degrees. Ignore any reflections from the surface BC.

i think the answer would be b

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y

it is b. absorbs thermal energy