Physics
What is the force of attraction between any two bodies by virtue of their masses is called?

Electromagnetic Force
Centripetal Force
Nuclear Force
Gravitational Force

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Physics
In total internal reflection, the light travel from

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

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