What is the critical angle θcritθcrittheta_crit for light propagating from a material with index of refraction of 1.50 to a material with index of refraction of 1.00?

The critical angle is 41.8°.

Explanation:

The critical angle is for which the angle of refraction is 90°. From Snell's law we have

Putting in and we get:

Thus, the critical angle is 41.8°.

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .