Modern Physics 4 Question 29
30. In an X-ray tube, electrons accelerated through a potential difference of $15,000 V$ strike a copper target. The speed of the emitted X-ray inside the tube is ……. $m / s$.
(1992, 1M)
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Solution:
- X-rays are electromagnetic waves and electromagnetic waves travel with the speed of light i.e. $3.0 \times 10^{8} m / s$.
