w, currents are produced ; as may be beautifullyshown by placing a lighted lamp under a flask con-taining water, mth wltich is mixed some fine insolu-ble powder, a? pulverized amoer. The small fragmentsof amber will be seen tp rise in the centre, graduallyflow off towards the sides, and then fall… … RADIATION., li LECTURE II RADIATION, ABSORPTION, TRANSMISSION, THEORYOF EXCHANGES OF HEAT. RADIATIO>f. 19. Heat is emitted from the surface of a hot body equally iaall directions, and always in straight lines. 20. The intensity of radiant heat varies inversely as thesquare of the distance from…
Physics
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