JEE Main & Advanced Physics Transmission of Heat Question Bank Radiation Wein's law

  • question_answer
    The wavelength of maximum emitted energy of a body at 700 K is 4.08 \[\mu m\]. If the temperature of the body is raised to 1400 K, the wavelength of maximum emitted energy will be                                                     [MP PET 1990]

    A)            \[1.02\ \mu m\]                  

    B)            16.32\[\mu m\]

    C)            8.16\[\mu m\]                     

    D)            2.04\[\mu m\]

    Correct Answer: D

    Solution :

               \[{{\lambda }_{{{m}_{1}}}}{{T}_{1}}={{\lambda }_{{{m}_{2}}}}{{T}_{2}}\Rightarrow {{\lambda }_{{{m}_{2}}}}=\frac{{{\lambda }_{{{m}_{_{1}}}}}{{T}_{1}}}{{{T}_{2}}}\]   \[=4.08\times \frac{700}{1400}=2.04\,m\]


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