Physics
Acceleration is

Directly proportional to force
Inversely proportional to mass
Inversely proportional to force
Directly proportional to mass

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Physics
In total internal reflection, the light travel from

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

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