What is the wavelength of ligth for the least energetic photon emitted in the Lyman series of the hydrogen spectrum. (Take , hc =1240 eV -nm)

Question

What is the wavelength of ligth for the least energetic photon emitted in the Lyman series of the hydrogen spectrum. (Take , hc =1240 eV -nm)

What is the wavelength of ligth for the least energetic photon emitted in the Lyman series of the hydrogen spectrum. (Take , hc =1240 eV -nm)
A. 122nm
B. 82nm
C. 150nm
D. 120nm

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - A
Given ,hc =1240 eV
For least energetic photon, `E=E_(2)-E_(1)=10.2 eV`
We know that `E=(hc)/(lambda),lambda=(hc)/(E),lambda=(1240)/(10.2)`
`" " lambda=121.56~~122nm`

5 views Answered 2023-02-05 15:29