Physics
Compressions and Rarefactions are characteristic of

Neither of A & B
Transverse waves
Both A & B
Longitudinal waves

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Physics
What is a compound microscope?

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

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