Physics
In total internal reflection, the light travel from

Rarer to denser medium and it occurs with no loss of intensity
Denser to rarer medium and it occurs with loss of intensity
Denser to rarer medium and it occurs with no loss of intensity
Rarer to denser medium and it occurs with loss of intensity

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Physics
A white and smooth surface is

Good absorber and bad reflector of heat
Bad absorber and bad reflector of heat
Bad absorber and good reflector of heat
Good absorber and good reflector of heat

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