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Question

Question: The maximum energy in the thermal radiation from a hot source occurs at a wavelength of 11 × 10<sup>...

The maximum energy in the thermal radiation from a hot source occurs at a wavelength of 11 × 10–5 cm. According to Wien's law, the temperature of this source (on Kelvin scale) will be n times the temperature of another source (on Kelvin scale) for which the wavelength at maximum energy is 5.5 × 10–5 cm. The value n is –

A

2

B

4

C

1/2

D

1

Answer

1/2

Explanation

Solution

11 × 10–5 T1 = 5.5 × 10–5 T2

T1T2\frac{T_{1}}{T_{2}} = 12\frac{1}{2}