Question

Total number of lines emitted in infrared region when electron de excited from 5th excited state to 1st excited state will be

Answer 1

answer : 6

explanation : we have to find number of lines emitted in infrared region when electron de- excited from 5th excited state to 1st excited state.

so, 5th excited state = 6th shell

i.e., n = 6

we know, In the infrared region, we have Paschen, Brackett, and Pfund series which are transitions from high levels to n=3, n=4, and n=5 respectivly.

so, lines emitted in infrared region ;

6 → 5

6 → 4

6 → 3

5 → 4

5 → 3

4 → 3

there are total six number of lines emitted in infrared region.