2. Solved Papers
  3. RAJASTHAN ­ PET

RAJASTHAN ­ PET Rajasthan PET Solved Paper-2004

  • question_answer
    A star of velocity \[{{10}^{6}}m/s\] is going away from earth. If the wavelength of its spectrum line is 5700 \[\overset{o}{\mathop{\text{A}}}\,\], Dopper displacement will be

    A)  200\[\overset{o}{\mathop{\text{A}}}\,\]          

    B)  19\[\overset{o}{\mathop{\text{A}}}\,\]

    C)  20 \[\overset{o}{\mathop{\text{A}}}\,\]           

    D)  0.2 \[\overset{o}{\mathop{\text{A}}}\,\]

    Correct Answer: B

    Solution :

     Dopier displacement \[\Delta \lambda =\frac{v}{c}\lambda \] \[=\frac{{{10}^{6}}}{3\times {{10}^{8}}}\times 5700\] \[=19\overset{o}{\mathop{\text{A}}}\,\]


You need to login to perform this action.
You will be redirected in 3 sec spinner