A diamond is cut such that the angle between its top surface and its bottom surface is α. For α = 45°, find the largest possible value of the incident angle θa such that the blue light is totally internally reflected off the bottom surface.
What is the angle?

Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy