$A$ black body has a maximum wavelength $\lambda_m$ at $2000\,K$. Its corresponding wavelength at $3000\,K$ will be:
- A$\frac{16}{81} \lambda_m$
- B$\frac{81}{16} \lambda_m$
- C$\frac{3}{2} \lambda_m$
- D$\frac{2}{3} \lambda_m$
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