How does angle of incidence of radiant energy affect the rate of temperature change along a surface?
2007-01-05 15:14:54 · 4 answers · asked by Anonymous in Environment
Imagine a focused beam of energy striking normal to the surface. All the energy is in one concise area. Now, tip the surface or move the source. You'd see the area enlarge, elongate so the same amount of energy is spread over a larger area and the heating will be slower.
2007-01-05 15:24:23 · answer #1 · answered by Richard S 6 · 0⤊ 0⤋
The lesser the angle of incidence, or if you prefer, the farther from being perpendicular at the point of intersection to the surface of an object, the higher the percentage of deflection. The more perpendicular the angle of incidence of radiant energy is, the greater the amount of energy transfer to the surface of an object.
Helps to think of the effect as that of a bullet strike, the more direct the strike, the greater the damage, where as a bullet that glances a surface will cause more minimal damage.
2007-01-05 23:21:38 · answer #2 · answered by Duane 3 · 0⤊ 0⤋
Take a flash light. Shine the beam directly down on a surface holding it approx 1 ft away. Note the diameter of the beam. Now hold the beam at approx a 45 degree angle about one foot away from the surface. Notice the surface area is less concentrated at an angle. If the flashlight was a real source of light and heat like a sun, and the surface was the surface of the earth, this would have heat at less of a concentration at a greater angle of incidence.
2007-01-05 23:26:26 · answer #3 · answered by eric l 6 · 0⤊ 0⤋
man how m i supposed to kknow?????
2007-01-05 23:17:43 · answer #4 · answered by Hally berry 3 · 0⤊ 0⤋