Physics
Which one of the following is the correct sequence of passage of light in a compound microscope?

Condenser -Objective lens -Eye -piece -Body tube
Condenser -Objective lens -Body tube -Eyepiece
Objective lens -Condenser -Body tube -Eye piece
Eyepiece -Objective lens -Body tube -Mirror

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Physics
The blue colour of sky is due to

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

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