A black body at 200 K is found to exit maximum energy at a wavelength of `14mu m` . When its temperature is raised to 1000 K , the wavelength at which maximum energy is emitted isA. `14mum`B. `70muF`C. `2.8mum`D. `7mum`

A black body at 200 K is found to exit maximum energy at a wavelength

1.	A black body at 200 K is found to exit maximum energy at a wavelength of `14mu m` . When its temperature is raised to 1000 K , the wavelength at which maximum energy is emitted isA. `14mum`B. `70muF`C. `2.8mum`D. `7mum`
Answer» Correct Answer - C `lamda_(m_(1))T_(1)=lamda_(m_(2))T_(2)` `therefore lamda_(m_(2))=(lamda_(m_(1))T_(1))/(T_(2))=(14xx200)/(1000)` `=2.8mum`.

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A black body at 200 K is found to exit maximum energy at a wavelength of `14mu m` . When its temperature is raised to 1000 K , the wavelength at which maximum energy is emitted isA. `14mum`B. `70muF`C. `2.8mum`D. `7mum`

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