NEET AIPMT SOLVED PAPER 2002

  • question_answer
                    Wien's displacement law expresses relation between:                                                                  

    A)                 wavelength corresponding to maximum  energy and absolute temperature

    B)                 radiated energy and wavelength

    C)                 emissive power and temperature           

    D)                 colour of light and temperature

    Correct Answer: A

    Solution :

                    According to Wien's displacement law, the quantity of energy radiated out by a body is not uniformly distributed over all the wavelengths emitted by it. It is maximum for a particular wavelength \[(\lambda ),\] which is at different temperatures. As the temperature is increased, die value of the wavelength which carries maximum energy is decreased.                 The statement of this law is as follows:                 ?The wavelength corresponding to maximum energy is inversely proportional to the absolute temperature of the body.? \[i.e.,{{\lambda }_{m}}\propto \,\,\frac{1}{T}\] \[or{{\lambda }_{m}}T=\text{cosntant}\]


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