Black body's absolute temperature multiplied by a factor: new wavelength of maximum intensity

1. A.
   $\frac{2\lambda}{3}$
2. B.
   $\frac{4\lambda}{3}$
3. C.
   $\frac{16\lambda}{81}$
4. D.
   $\frac{81\lambda}{16}$

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1. A.
   $\dfrac{2\lambda}{3}$
2. B.
   $\dfrac{2\lambda}{5}$
3. C.
   $\dfrac{4\lambda}{5}$
4. D.
   $\dfrac{16\lambda}{81}$

Tap an option to check your answer.