Physics
Rainbow is due to

refraction and reflection of sunlight by water droplets
ionisation of water deposits
absorption of sunlight in minute water droplets
diffusion of sunlight through water droplets

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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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