Physics
Boyle's law is a relationship between

Volume and density
Pressure and temperature
Pressure and volume
Volume and temperature

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Physics
In total internal reflection, the light travel from

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

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