Does light from a neon sign have a continuous spectrum? Explain.

Yes. Excited neon atoms emit photons of specific, discrete energies; however, there are an infinite number of possible transitions between energy states for neon. Because all of these transitions emit photons in the visible spectrum, these create a practically continuous spectrum, not a line spectrum.
Yes. Neon atoms do not form diatomic molecules, like hydrogen can. Only diatomic molecules like H emit line spectra; neon atoms emit continuous spectra.
No. Excited neon atoms emit photons of specific, discrete energies when the atoms transition from high energy states to lower energy states. These create a line spectrum, not a continuous spectrum.
No. Neon signs emit a nearly continuous spectrum, but they emit no photons at the specific, discrete energies when the atoms transition from low energy states to higher energy states.

Yes. When neon atoms are excited and emit light, they do so through a process called spontaneous emission. This means that the photons emitted can have a range of energies corresponding to the various possible transitions between energy states of the neon atoms. As a result, the light from a neon sign has a continuous spectrum rather than a discrete line spectrum.