Question

On investigation of light from three different Stars A, B and C, it was found that in the spectrum of A the intensity of red colour is maximum, in B the intensity of blue colour is maximum and in C the intensity of yellow colour is maximum. From these observations, it can be concluded that–

• A. The temperature of A is maximum, B is minimum and C is intermediate
• B. The temperature of A is maximum, C is minimum and B is intermediate
• C. The temperature of B is maximum, A is minimum and C is intermediate
• D. The temperature of C is maximum, B is minimum and A is intermediate

Answer 1

Answer: (C)

The temperature of B is maximum, A is minimum and C is intermediate

Answer 2

From Wien's law $\begin{matrix} \lambda_{m}T = const. \end{matrix}$

As l­, T¯