Question

A particular star (assuming it as a black body) has a surface temperature of about $5\times {10}^{4}K$. The wavelength in nanometre at which its radiation becomes maximum is ($b=0.0029mK$)

• A. $48$
• B. $58$
• C. $60$
• D. $70$

Answer 1

The correct option is B $58$

By Wein's displacement law , ${\lambda }_{m}T=b$

So , ${\lambda }_m=\frac{0.0029}{5\times {10}^4}=58nm$