Hydrogen atoms are excited from ground state to the state of principle quantum number 4. Then the number of spectral lines observed will be
A. 3
B. 6
C. 5
D. 2
Answer:B
Hydrogen atoms are excited from ground state to the state of principle quantum number 4. Then the number of spectral lines observed will be
A. 3 B. 6 C. 5 D. 2