Answer:
Using basic constants such as speed of light (c), charge on
electron (e), mass of electron ,
mass of proton (m ) and gravitational constant (G), we can construct the
quantity,
Now
Clearly, the quantity t has the
dimensions of time.
Put and
= 0.667 billion years.
This time is slightly less than
the age of the universe ( 15
billion years). It implies that the values of the basic constants of physics
should change with time because the age of the universe increases with time.
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