Ok, I think I get it. Thanks! So the incidental angle would be 30 degrees which is smaller than the critical angle of 41.8. Thus, it will not result in total internal reflection.
Homework Statement
When the striking ray is held perpendicular to the prism, there are four general configurations possible (in the attachment below). Use the figure on the next page to determine analytically which of these four configurations will result in total internal reflection of the...