A) \[3\times {{10}^{8}}m/s\]
B) \[2.8\times {{10}^{8}}m/s\]
C) \[3.1\times {{10}^{8}}m/s\]
D) \[3\times {{10}^{10}}m/s\]
Correct Answer: C
Solution :
X-rays travel in straight line with speed of light ie, \[3\times {{10}^{8}}m/s\].
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