Physics
'Mirage' is an example of

Total internal reflection of light only
Refraction and total internal reflection of light
Dispersion of light only
Refraction of light only

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Physics
Analog synthesis refers to a technology based on

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

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