Physics
What is a compound microscope?

A microscope that has one lens.
A microscope whose lenses are concave.
A microscope that has two sets of lenses : an occular lens and an eyepiece.
A microscope whose lenses are convex.

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Physics
To resolve an object in an electron microscope,

The wavelength of the electrons must be close to the diameter of the object
Both A & B
None of these
The wavelength of the electrons must be greater than the diameter of the object.

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