Answer:Electron was originate from n=5
line observed i infrared region
Explanation:
c= νλ(where ‘c’ is the velocity, ‘ν’ is the frequency and ‘λ’ is the wavelength
v = 3x10^8/1280x10^-9
v= 0.000234375hz
ν⁻(wave umber)=1/λ
= 1/1280x10-⁷
-= 7812.50cm⁻¹
wave no= R( 1/n₁ - 1/ n₂)
7812.5 = 109678( 1/3²- 1/n₂²)
7812.5/ 109678= (0.111 - 1/n₂²)
0.07-0.111 = -1/n₂²
-0.041 = -1/n₂²
n₂² = 24.39
= 4.93 ≅5
Electron was originate from n=5
line observed i infrared region
