Physics
The basic reason for the extraordinary sparkle of suitably cut diamond is that

It has well defined cleavage planes
It is very hard
It has a very high refractive index
It has a very high transparency

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

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

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