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NEET Sample Paper NEET Sample Test Paper-33

  • question_answer
    Suppose there be four articles having colours blue, red, black and white, when they are heated together and allowed to cool, which article will cool at the earliest?                           

    A)  Blue              

    B)  Red

    C)  Black             

    D)  White                 

    Correct Answer: B

    Solution :

    Key Idea: Red colour has maximum wavelength. According to Wien's displacement law the relation between maximum wavelength \[{{\lambda }_{m}}\] and temperature T is \[{{\lambda }_{m}}T=\] constant Which implies longer the wavelength smaller the temperature. As, red colour has maximum wavelength, hence its temperature will be minimum and hence, it will cool at the earliest.


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