Question

2. Calculate the wavelength of the emitted photon from hydrogen for the transition from ni = 3 to nf = 2. What part of the visible spectrum is this wavelength? Visible wavelengths are: Red  700 - 620 nm, Yellow  620 - 560 nm, Green  560 - 500 nm, Blue 500 - 440 nm, and Violet  440 - 400 nm.

Answer 1

Answer:

The correct answer is "654.54 nm".

Explanation:

According to the question,

⇒ $\frac{1}{\lambda}= Rh(\frac{1}{n1^2} -\frac{1}{n2^2} )$

By substituting the values, we get

       $=1.1\times 10^7(\frac{1}{4} -\frac{1}{9} )$

       $=1.1\times 10^7(\frac{9-4}{36} )$

       $=1.1\times 10^7(\frac{5}{36} )$

       $=654.54\ nm$

Thus the above is the right solution.