The most prominent line in the spectrum of neon is found at 865.438 nm. Other lines are located at $837.761 \mathrm{nm}, 878.062 \mathrm{nm}, 878.375 \mathrm{nm},$ and $1885.387 \mathrm{nm}$
(a) In what region of the electromagnetic spectrum are these lines found?
(b) Are any of these lines found in the spectrum of neon shown in Figure $7.9 ?$
(c) Which of these lines represents the most energetic light?
(d) What is the frequency of the most prominent line? What is the energy of one photon with this wavelength?