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DUMET Medical DUMET Medical Solved Paper-2003

  • question_answer
     If a source is transmitting electromagnetic waves of frequency\[8.2\times {{10}^{6}}Hz\], the wavelength of electromagnetic wave transmitted from the source is:

    A)  18.8m        

    B)  36.5m

    C)  42.8m        

    D)  58m

    Correct Answer: B

    Solution :

     Key Idea: Electromagnetic waves travel with speed of light. The relation between frequency \[(f)\], speed (c) and wavelength \[(\lambda )\] is \[f=\frac{c}{\lambda }\] Given, \[f=8.2\times {{10}^{6}}Hz,\,c=3\times {{10}^{8}}m/s\] \[\therefore \] \[\lambda =\frac{3\times {{10}^{8}}}{8.2\times {{10}^{6}}}=36.5\,m\]


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