Suppose that a reflected light wave has an angle of reflection of 30°. what must be the angle of incidence and what must be the angle between the reflecting surface and the incoming wave? explain.

For the angle of reflection to be 30°, the angle of incidence must be 30°, too, because these two angles are always equal. So the angle between an imaginary line perpendicular to the surface of the barrier and the incoming wave must be 30°. For this to happen, the angle between the surface of the barrier and the incoming wave must be

90° – 30° = 60°.

Hope this helps.

Tobey

a) cold, dry

explanation:

continental polar masses are cold and dry air masses because the cold air cannot hold much moisture. as they move into warmer air, they can trigger precipitation.

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 .