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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Physics
Energy in reflected light :

Does not depends on the angle of incidence
Decreases with the increase in angle of incidence
Becomes maximum for angle of incidence equal to 45°
Increases with the increase in angle

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