Question

Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be

A) 2
B) 6
C) 5
D) 3​

Answer 1

option b is correct ✔ ✔

Answer 2

Question :

Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be

A) 2
B) 6
C) 5
D) 3​

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Correct Option : B) 6

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Explanation :

 n(n-1)/2 = 6