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Question

The maximum energy in the thermal radiation from a hot source occurs at a wavelength of 11×105 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.×105cm. The value n is

A
2
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B
4
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C
1/2
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D
1
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Solution

The correct option is C 1/2
Using Wein's law: λpeakT=c
So, 11×105T1=5.5×105T2
So, T1T2=12

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