Physics
'Mirage' is an example of

Refraction and total internal reflection of light
Dispersion of light only
Refraction of light only
Total internal reflection of light only

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

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

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