5. A light ray travelling through air has an angle of 39o. The light then enters into another medium at an angle of 28o.
a. On the diagram below draw how light travels through the air into the unknown medium. (Use a protractor to help you do the question).
b. On the diagram above label which medium is more dense and which is less dense.
c. Calculate the index of refraction for the unknown medium.
d. What is the unknown medium? (You can do internet research)ii
