Answer
(B) $3.18$ eV
Work Step by Step
$E = \frac{hc}{\lambda}$ where $h = 6.626*10^{-34} J*s$ and $c = 3*10^8 $ m/s
$E = 5.10*10^{-19} J$
$1$ $J$ $= 6.24*10^{18} $ eV
Hence, we find:
$E = 3.18$ eV
Materials Science and Engineering: An Introduction
by Callister, William D.; Rethwisch, David G.
Published by
Wiley
ISBN 10:
1118324579
ISBN 13:
978-1-11832-457-8
Chapter 21 - Optical Properties - Questions and Problems - Fundamentals of Engineering Questions and Problems - Page 867: 21.1FE
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