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BVP Medical BVP Medical Solved Paper-2003

  • question_answer
    A black body at 200 K is found to exit maximum energy at a wavelength\[14\mu m.\]When its temperature is raised to 1000 K, then wavelength at which maximum energy emitted is :

    A)  14 mm                

    B)  7\[\mu m\]

    C)  2.8 \[\mu m\]                  

    D)  28 mm

    Correct Answer: A

    Solution :

                     From Wiens displacement law \[{{\lambda }_{m}}T=\]= constant, Hence,  \[{{\lambda }_{{{m}_{1}}\,}}{{T}_{1}}={{\lambda }_{{{m}_{2}}}}{{T}_{2}}\] So,  \[{{\lambda }_{{{m}_{2}}}}=\frac{{{\lambda }_{{{m}_{1}}}}{{T}_{1}}}{{{T}_{2}}}=\frac{14\times 200}{1000}=2.8\mu m\]


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