CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2000

  • question_answer
    On increasing the temperature of a substance gradually, which of the following colours will be noticed by you:

    A)  white                                  

    B)  yellow

    C)  green                                  

    D)  red

    Correct Answer: D

    Solution :

    According the Wein's law, we have \[T\propto \frac{1}{\lambda },\] where\[\lambda \] is the wavelength. When the temperature is increased the wavelength decreases. As the red colour, has the minimum wavelength hence, the red colour will be noticed by you.


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