First slide

Order of magnitudes

Question

The range of time scale in physics is:

Moderate

A

$10^{- 5} t o 10^{7} s$
B

$10^{- 10} s t o 10^{10} s$
C

$10^{2} s t o 10^{15} s$
D

$10^{- 22} s t o 10^{18} s$

Solution

10^-22 sec is the mean life of a very unstable nucleus and 10¹⁸ sec is the life of the universe.

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