Atoms And Nuclei Question 68
Question: Hydrogen atoms are excited from ground state of the principal quantum number 4. Then the number of spectral lines observed will be [CBSE PMT 1993]
Options:
A) 3
B) 6
C) 5
D) 2
Show Answer
Answer:
Correct Answer: B
Solution:
Number of spectral lines $ N_{E}=\frac{n(n-1)}{2}=\frac{4(4-1)}{2}=6 $
