MHT CET 2023 Physics question
The wavelength of light for the least energetic photons emitted in the Lyman series of the hydrogen spectrum is nearly [Take hc = 1240eV – nm, change in energy for the levels = 10.2 eV]
Answer: (B)
Solution
In the Lyman series electrons fall to . The least energetic photon corresponds to the smallest energy gap, i.e. the transition , with eV (given). Then \frac{hc}{Δ E}\frac${1240\ \text{eV
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