PH-723
Thermal radiation
Physics · Secondary 3 · Hard · Thermal radiation
Water at is poured into two identical cans. Can X is dull black on the outside, while can Y is polished silver. Both are left uncovered in the same room. After 10 minutes, which can will contain the cooler water and why?
- Can X, because dull black is a better emitter of heat.
- Can X, because dull black is a poorer emitter of heat.
- Can Y, because polished silver is a better emitter of heat.
- Can Y, because polished silver absorbs more heat from the room.
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