The gas in interstellar space between the stars is very tenuous ("thin").Near a hot star,this gas is heated to a high temperature.Any such hot,tenuous gas emits light
A) at all wavelengths,peaking at a certain wavelength or color.
B) at no wavelength,because hot thin gases do not emit light.
C) only at specific wavelengths ("spectral lines"),and these spectral lines do not change in wavelength as the temperature changes.
D) only of specific colors ("spectral lines")whose wavelengths change as the temperature changes.

Question

Quizplus · Accepted Answer

When a hot, tenuous gas emits light, it does so at specific wavelengths, known as spectral lines. These lines do not change in wavelength as the temperature changes. Therefore, option C is the best choice. Option A is incorrect because the emission is not at all wavelengths. Option B is incorrect because hot thin gases do emit light. Option D is incorrect because while the emission is at specific colors, the wavelengths of these colors do not change with temperature.

The Gas in Interstellar Space Between the Stars Is Very