Physics
To resolve an object in an electron microscope,

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

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Physics
In the gamma decay of a nucleus

Neither the mass number nor the atomic number of the nucleus changes
The mass number of the nucleus does not change whereas its atomic number changes
Both the mass number and the atomic number of the nucleus change
The mass number of the nucleus changes whereas its atomic number does not change

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