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The value of Planck's constant is $6.63\times10^{-34}$ Js. The speed of light is $3\times10^{17}$ nm $s^{-1}$. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of $6\times10^{15}$ $s^{-1}$?
A
75
B
10
C
25
D
50
Detailed Solution
$\lambda = \frac{c}{\nu} = \frac{3\times10^{17}\ nm\,s^{-1}}{6\times10^{15}\ s^{-1}} = 50$ nm