Physics
To resolve an object in an electron microscope,

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

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Physics
The term ''equinox' means

The axis of the Earth around which it rotates
The path which the Earthtakes around the Sun
The time when the Sun seems to be going round and round in the sky in the Arctic but does not go below the horizon
When the day and night are of equal duration

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