Question

The transition energy of the electron from higher to lower level is $3.0\times10^{-19},J$. The wavelength of the emitted light is about ($h=6.625\times10^{-34},Js,\ c=3\times10^8,ms^{-1}$)

• A. $330,nm$
• B. $660,nm$
• C. $990,nm$
• D. $310,nm$
• E. $230,nm$

Hint:

Chemistry Tip: Visible red light lies near $650$--$700,nm$, so $660,nm$ is a quick realistic check.

Answer 1

The Correct Option is B