An excited electron jumps back to its ground state in two steps. What will its emission spectrum look like?

A) one long line

B) one thick line

C) two distinct lines

D) a continuous patch

C. two distinct lines.

Explanation:

Emission spectral is the characteristics of energies involved. When an electron absorbs energy, it gets excited and jumps to a higher energy level that has a quantified energy value equal to that absorbed. On de-excitation, it drops back to a lower energy level or the ground state and emmit energy(ies) in the process in form of spectrum.

In the question given, the electron jumps back to its ground state in two steps. It initially drops from the excited state to a lower energy level and latter drops to its ground state. Thus, two distinct lines would be emitted.

i would say b

explanation:

but i think i would need more information than that

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.