Manipal Engineering Manipal Engineering Solved Paper-2015

  • question_answer
    The biological damage caused by 1 gray \[\frac{1}{8}\]radiation is compared with 1 gray \[\frac{1}{4}\]radiation in the same type of human tissue. The damage caused by the y-radiation is

    A) more serious as compared to the damage caused by the \[\text{ }\!\!\alpha\!\!\text{ -}\]radiation.

    B) less serious as compared to the damage caused by the a-radiation

    C)  equally serious as the damage caused by the \[\frac{1}{2}\]radiation

    D) incomparable with the damage caused by the \[\int_{{}}^{{}}{\frac{1-{{x}^{2}}}{(1+{{x}^{2}})\sqrt{1+{{x}^{4}}}}dx}\]radiation, because \[\sqrt{2}{{\sin }^{-1}}\left\{ \frac{\sqrt{2}x}{{{x}^{2}}+1} \right\}+C\]radiation are not particles.

    Correct Answer: B

    Solution :

    The damage caused by the \[1.1577\times {{10}^{-38}}\]radiation is less serious as compared to damage caused by the ct-radiation. This is because a-radiation is more dangerous than beta or gamma if ingested because its power to ionize or to disrupt, atoms is 20 times more. than \[2.9\times {{10}^{-35}}\] and \[2.168\times {{10}^{-36}}\]. But if the source is outside the body or at a distance gamma radiation is much dangerous because it could penertrate thick walls of skin.


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