Physics
Scalar Quantities are

Physical quantities which have no magnitude and no direction
Physical quantities which have no magnitude only and only direction
Physical quantities which have magnitude only and no direction
Physical quantities which have magnitude only and direction

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Physics
An electron microscope gives higher magnification than an optical microscope, because :

The velocity of electron is smaller than that of visible light
It uses more powerful lenses
The wavelength of electrons is smaller as compared to the wavelength of visible light
The electrons have more energy than the light particles

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