Question

A photon is emitted from n = 4 to n = 1 level in hydrogen atom the corresponding wavelength for this transfer will be [hc = 1240 nmeV].

• A. 88.2 nm
• B. 121.7 nm
• C. 102.5 nm
• D. 97.3 nm

Answer 1

Answer: (D)

97.3 nm

Answer 2

△E = $\frac{hc}{λ}$
l = $\frac{hc}{△E_{4-1}}$
= $\frac{1240 nm eV}{12.75 eV}$
= 97.3 nm

The correct option is (D): 97.3 nm