SC-1424
Radiation
Lower Sec Science · Secondary 2 · Hard · Radiation
A student places equal volumes of hot water into two identical metal cans. One can is painted dull black, and the other is shiny silver. Both are left in a cool room.
Which can will lose heat faster by radiation, and why?
Which can will lose heat faster by radiation, and why?
- The dull black can, because black is a better emitter of radiation.
- The shiny can, because shiny surfaces emit more radiation.
- Both cans lose heat at the same rate because colour only affects absorption.
- Both cans lose heat at the same rate because they are the same size.
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