Physics
Stationary wave is formed by

Two waves of same frequency travelling in the same direction
Two waves of same frequency travelling in the opposite direction
A transverse wave superposing a longitudinal wave
Two waves of the same speed superposing

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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 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

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