ENVIRSC 1C03 Lecture Notes - Lecture 5: Radiant Energy, Photosphere, Sensible Heat
5 Dec 2017
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Objective: to understand how the sun generates and emits energy, which energy reaches earth, a(cid:374)d how tis distri(cid:271)uted i(cid:374) the earth"s at(cid:373)osphere. The earth receives energy from the sun, which is our nearest star (150 million km from earth) Thermonuclear process in sun generates enormous amounts of energy which eventually works its way to the suns outer luminous. Temps in photosphere of sun generally much cooler at 5,700 c. Energy transferred from the sun to the earth is called radiant energy or radiation. Travels in the form of waves that release energy when they are absorbed by an object. These waves have electric and magnetic properties, therefor why they"re (cid:272)alled electromagnetic waves. Each wave has a wave length; wave length determines the form of energy (light or heat) Radiation that we can see is visible light. Longer waves carry less energy than the shorter waves. Insolation is a term used to describe incoming solar radiation.
