Calculate the wavelength of the spectral line, when an electron in the hydrogen atom undergoes a transition from the energy level 4 to energy level 2. RH=109678cm−1
A
486 nm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
554 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
386 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
427 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is A 486 nm Using the formula, 1λ=RH(1n21−1n22)whereλis the wavelength RH=109678cm−1;n1=2;n2=41λ=109678[14−116]=109678×316
On solving, λ=486 nm