2. Solved Papers
  3. CEE Kerala Engineering

CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2003

  • question_answer
    A dim star of magnitude\[+14.5\]explodes into a nova of magnitude\[+2\]. The factor by which the brightness of the star has increased is:

    A)  12.5                      

    B)         \[{{10}^{2}}\]                   

    C)  \[{{10}^{3}}\]                   

    D)         \[{{10}^{4}}\]

    E)  \[{{10}^{5}}\]

    Correct Answer: E

    Solution :

    \[\frac{{{I}_{1}}}{{{I}_{2}}}={{(100)}^{({{m}_{1}}-{{m}_{2}})/5}}={{(100)}^{(14.5-2)/5}}\] \[={{(100)}^{5/2}}\] \[={{10}^{5}}\] 


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