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स्टीफन नियतांक का मात्रक है
A
$J\,{s^{ - 1}}$
B
$J\,{m^{ - 2}}{s^{ - 1}}{K^{ - 4}}$
C
$J\,{m^{ - 2}}$
D
$J\,s$
$\frac{Q}{t} = \sigma A{T^4} $
$\Rightarrow \sigma = J{m^{ - 2}}{s^{ - 1}}{K^{ - 4}}$
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