Question

Rank these stars in terms of temperature from coolest to hottest Star A emits mostly ultraviolet light along with visible and infrared light Star B emits mostly visible light, along with some infrared light and a tiny bit of ultraviolet light Star C emits mostly infrared light with some red light

Answer 1

The list of stars from coolest to hottest is:

• Star C
• Star B
• Star A

Step-by-step explanation:

The temperature of light depends on the wavelength. Longer wavelengths are associated with cooler temperatures and shorter wavelengths with hotter temperatures. Infrared light is emitted in a wavelength longer than that of red visible light, while ultraviolet light has a shorter wavelength than the blue light at the other end of the visible spectrum.

This means that the emission spectrum of Star A is the most energetic (and therefore hottest) as it's light is mostly of a shorter wavelength.