Question

Write down the value of Stefan’s constant in SI units if its value in CGS system is 5.67 x 10⁻⁵ erg s⁻² cm-2 K⁻⁴.

Answer 1

Stefan Boltzmann constant is a physical constant denoted by Greek letter σ.Which represents constant of proportionality in Stefan - Boltzmann law .

C.G.S UNITS:σ= 5.67 x 10⁻⁵ erg/s cm² K⁴

S.I UNIT CONVERSIONS :1J=10⁷ ergs

1erg=10⁻⁷J

1m=100cm

1m²=10000cm²

1cm²=10⁻⁴ m²

σ=5.67 x10⁻⁵ x 10⁻⁷J/s 10⁻⁴m² K⁴

σ=5.67 x 10⁻⁵ x 10⁻³W m⁻² K⁻⁴

since 1 W =1J/S

∴σ=5.67 x 10⁻⁸ W m⁻² K⁻⁴

Answer 2

Answer:

Explanation:

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