Question

The sun emits a light with maximum wavelength 510 mm while another star X emits a light with maximum wavelength of 350 nm. What is the ratio of surface temperature of sun and the star X

• A. 2.1
• B. 0.68
• C. 0.46
• D. 1.45

Answer 1

Answer: (B)

0.68

Answer 2

As $\lambda \propto \frac{1}{T};$ so $\frac{T_{1}}{T_{2}} = \frac{\lambda_{2}}{\lambda_{1}} = \frac{350}{510} = 0.68$