Sun Angle and Solar Heating

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By Meghan Burton Period 3 June 12, 2006

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Presentation transcript:

Sun Angle and Solar Heating Investigation 3 Part 3

Light Light is a form of energy! The headlamp and the sun are both sources of light energy. I used the headlamp to shine light energy on the floor.

Beam Spreading The size and shape of the light spot changes, depending on the angle of shine. The light spot gets bigger as the angle between the beam of light and floor gets smaller. The amount of light energy in the beam stays the same, so both light spots deliver the same amount of energy to the paper.

Solar Energy Energy travels from the Sun to Earth as radiation. Radiant energy travels in rays. The number of rays hitting a given area is the energy density. When lots of rays hit an area, energy density is high. The angle at which light strikes a surface is called solar angle.