A Hydrogen Atom Is Excited to The $n = 11$ Level Its Decay to The to The n

Multiple Choice

A hydrogen atom is excited to the $n = 11$ level. Its decay to the $n = 7$ level is detected in a photographic plate. What is the wavelength of the light photographed? $\left( c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , 1 \mathrm { eV } = \right.$ $\left. 1.60 \times 10 ^ { - 19 } \mathrm {~J} , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } \right)$

A) $4670 \mathrm {~nm}$
B) $4380 \mathrm {~nm}$
C) $7510 \mathrm {~nm}$
D) $12,400 \mathrm {~nm}$