Physics
In which one of the following the phenomenon of total internal reflection of light is used ?

Twinkling of stars
Formation of rainbow
Working of binoculars
Formation of mirage

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Physics
In total internal reflection, the light travel from

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

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