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A photochemical system may store light energy from the Sun as chemical energy
and then, only incidentally to the photochemical process, release that energy as
electrical energy. This reaction occurs in the solar battery, used to supply the ...
yellow-orange colour of carrots) also can absorb light and may supplement or
replace chlorophyll as the light-absorbing molecules in some plant cells; the light
energy absorbed by these pigments, however, must be passed to chlorophyll ...
In a collision a bound electron may be raised from a low to a high energy state, or
excited. This, however, can occur only by the expenditure of kinetic energy and
only if the kinetic energy exceeds the difference between the two energy states.
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The New Encyclopaedia Britannica (Encyclopaedia)User Review - Not Available - Book Verdict
For virtually all its 238 years,Britannica has ruled the shelves as a peerless general encyclopedia. Reviewers have consistently given it high marks for most of the 12 criteria identified inKister's ... Read full review