An incident ray traveling in a slower medium strikes a boundary with a faster medium. what happens when its angle of incidence is greater than the critical angle?

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

15.3 cos 65 degrees trig