Atomic Structure Question 393

Question: When electronic transition occurs from higher energy state to lower energy state with energy difference equal to $ \Delta E $ electron volts, the wavelength of the line emitted is approximately equal to

Options:

A) $ \frac{12395}{\Delta E}\times {10^{-10}}m $

B) $ \frac{12395}{\Delta E}\times 10^{10}m $

C) $ \frac{12395}{\Delta E}\times {10^{-10}}cm $

D) $ \frac{12395}{\Delta E}\times 10^{10}cm $

Show Answer

Answer:

Correct Answer: A

Solution:

  • $ \lambda =\frac{hc}{\Delta E} $

$ =\frac{6.62\times {10^{-34}}Js\times 3\times 10^{8}m{s^{-1}}}{E\times 1.602\times {10^{-19}}J} $

$ =\frac{12395}{E}\times {10^{-10}}m $



NCERT Chapter Video Solution

Dual Pane