Physics
No current will flow between two charged bodies if they have the same

Charge/ potential ratio
Potential
Charge
Resistance

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

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