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RAJASTHAN PMT Rajasthan - PMT Solved Paper-1998

  • question_answer
    A black body radiated high intensity radiation of 13\[\text{M}\]when temperature is \[200{}^\circ K\] if the temperature is increased upto \[1000\overset{\text{o}}{\mathop{\text{A}}}\,\]. Then calculate high intensity radiation:

    A)  70 \[\text{M}\]               

    B)         70 m

    C)  2.8 \[\text{M}\]              

    D)         2.8 mm

    Correct Answer: C

    Solution :

    For black body radiation \[\frac{{{\lambda }_{2}}}{{{\lambda }_{1}}}=\frac{{{T}_{1}}}{{{T}_{2}}}\] \[\frac{{{\lambda }_{2}}}{14\mu M}=\frac{200}{1000}\] \[{{\lambda }_{2}}=2.8\mu M\]


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