Question

The sun emits maximum radiation of $0.52$ micrometer. Assuming the sun to be a black body, the surface temperature of the sun would be (Wien's constant $=2.898\times {10}^{-3}mK$)

• A. $2345K$
• B. $5573K$
• C. $9847K$
• D. $6492K$

Answer 1

The correct option is B $5573K$

Given
$b=2.898\times {10}^{-3}mK$
${\lambda }_m=0.52$ micro meter

From Wien's displacement law,
${\lambda }_m=\frac{b}{T}$
where, $b$ = Wien's constant

$T=\frac{2.898\times {10}^{-3}}{0.52\times {10}^{-6}}=5573K$