Question

The temperature of the photosphere of the Sun is about 6000 K. Wien’s displacement law constant is 2.898 × 10^-3 m.K. The photosphere has maximum emissive power at wavelength 

(A) 483 nm 

(B) 496.7 nm 

(C) 4830 nm 

(D) 4967 nm.

Answer 1

Correct Option is (A) 483 nm

We know that , Wein's displacement law

\(\lambda m T = b\)

where b = Wein's Constant

\(\lambda m = \frac{b}{T}\)

\(\lambda m = \frac{2.898 \times 10^{-3}}{6000}\)

\(\lambda m = 483nm\)

Answer 2

Correct option is (A) 483 nm