Physics
An integrated circuit is more advantages than a coventional circuit because

They make the electric equipments more reliable and easier for servicing
A faulty part of a conventional circuit may be difficult to locate and repair
All listed here
If a part of the integrated circuit fails the entire circuit is simply replaced

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

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

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