Physics
If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is:

Concave mirror
Plano-concave mirror
Convex mirror
Plane mirror

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Physics
The blue colour of sky is due to

Refraction of sunlight
Reflection of sunlight
Scattering of shorter wavelengths of sunlight in the atmosphere
Scattering of longer wavelengths of sunlight in the atmosphere

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