Question

Experimental investigation show that the intensity of solar radiation is maximum for a wavelength $480nm$ in the visible region. Estimate the surface temperature of sun.(Given Wien's constant $b=2.88\times {10}^{-3}mK)$:

• A. $4000K$
• B. $6000K$
• C. $8000K$
• D. ${10}^{6}K$

Answer 1

Answer: (B)

$6000K$

According to Wein's displacement law,
${\lambda }_{max}T=b$
where $b$ is the Wein's constant
$\therefore T=\frac{b}{\lambda max}$
Substituting the given values,we get
$T=\frac{2.88\times {10}^{-3}mK}{480\times {10}^{-9}m}=6000K$