Dual Nature Of Light Question 490
Question: An X-ray machine has an accelerating potential difference of 25,000 volts. By calculation the shortest wavelength will be obtained as ( $ h=6.62\times {{10}^{-34}} $ J?sec; e = $ 1.6\times {{10}^{-19}} $ coulomb) [MP PET 1994]
Options:
A) 0.25 Å
B) 0.50 Å
C) 1.00 Å
D) 2.50 Å
Show Answer
Answer:
Correct Answer: B
Solution:
$ {\lambda_{\min }}=\frac{hc}{eV}=\frac{12375}{V},{\AA} $ $ =0.495{\AA}\approx 0.5,{\AA} $
BETA
