Physics
It is dangerous to observe Solar eclipse with naked eyes because

Infrared radiations from sun burn our retina
Ultraviolet radiations from Sun burn our retina
Cosmic rays reach eyes more during the eclipse
All radiations from sun initiate chemical reactions in eyes

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Physics
To resolve an object in an electron microscope,

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

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