# A great phy

One relation consists of some fundamental units that give the age of the universe is,

T = × s

Where,

T = Age of the Universe

e = charge of Electron = -1.6×10-19 C

ϵ0 = absolute permittivity

mp = Mass of the Proton = 1.67×10-27 kg

me = Mass of the Electron = 9.1×10-31 kg

c = Speed of light in vacuum = 3×108 m/s

G = Universal Gravitational constant = 6.67×1011 Nm2kg-2

And, = 9×109 Nm2 /C2

T =

≈ 6×109 years

≈ 6 billion years

( 1 billion year = 109 years)

Hence, The age of the universe, T ≈ 6 billion years.

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