Physics
Mirage is due to:

Depletion of ozone layer in the atmosphere
Equal heating of different parts of the atmosphere
Magnetic disturbances in the atmosphere
Unequal heating of different parts of the atmosphere

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Physics
Scalar Quantities are

Physical quantities which have no magnitude only and only direction
Physical quantities which have magnitude only and direction
Physical quantities which have magnitude only and no direction
Physical quantities which have no magnitude and no direction

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