Physics
Optical fibre works on which of the following principle of light?

Total internal reflection
Reflection
Refraction
Diffraction

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

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

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