Illustrates the branches of physics, Physics

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Q. Illustrates the branches of physics?

Answer:-

The basic branches of physics are classical mechanics electromagnetism including thermodynamics, optics, relativity and quantum mechanics.

Explain how was the length of a standard meter redefined in the year 1983?

Seeing as 1983 the meter has been defined as the distance light travels in a vacuum in exactly 1⁄ 299,792,458th of a second.


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