A) \[\alpha >\beta >\gamma \]
B) \[\alpha >\gamma >\beta \]
C) \[\gamma >\alpha >\beta \]
D) \[\gamma >\beta >\alpha \]
Correct Answer: D
Solution :
The order of velocity of a, P and y rays is: \[\underset{\begin{matrix} (3\times {{10}^{8}}m/s) & \begin{smallmatrix} \,\,\,\,\,(236\times {{10}^{8}}m/s) \\ \,\,\,\,to\,283\times {{10}^{8}}m/s \end{smallmatrix} & \,\,\,\,\,\,\,\,\,\,(2\times {{10}^{7}}m/s) \\ \end{matrix}}{\mathop{\begin{matrix} \gamma & \,\,\,\,\,\,\,>\,\,\,\,\,\, & \beta & \,\,\,\,\,\,\,\,>\,\,\,\,\,\,\, & \alpha \\ \end{matrix}}}\,\]
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