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
Analog synthesis refers to a technology based on

Placing brief digital recordings of live sounds under the control of a synthesizer keyboard.
Representing physical quantities as numbers.
Interfacing synthesizer equipment.
Representing data in terms of measurable physical quantities.

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