Would light from a red giant be red?

No. It would be less red than a candle flame, but more red than the Sun. So basically a very slight red tint. Not even really red tinted either, but golden looking compared to the Sun.

The light takes color depending on its wavelength. White light is all of the wavelengths of the visible spectrum put together. That is the ROY G BIV rainbow, which is the light our eyes can see. Red has the longest wavelength and the least energy, blue the shortest and the most energy. When the sun's light is passed through a prism, it refracts (bends) at different angles depending on the different wavelengths, which is what gives us that visible rainbow.

The sun is a yellow star because of its temperature. The temperature of the sun causes its light to fall in the yellow portion of the visible spectrum when seen from space. As the light passes through our atmosphere, the blue light refracts the most and so the sky looks blue. The total light, however, is what we call 'white light', and even though the sun falls in the yellow portion of the spectrum when compared with other stars, its light when it hits our eyes is clear (white) and contains all of the visible range of colors.

A red giant is red, yes, and the reason is because we're seeing its outer atmosphere which has been pushed outward due to the collapse of its core as it begins to run out of fuel. The core, being crushed inward, burns hotter for a time and this pushes the outer envelope of the star outward, causing those gases to cool. Since red light has the least energy, this drop in temperature lowers the energy of the light from that outer envelope, making the star appear red.

If you know the stars, go outside at night at around 9PM now and find Orion and Taurus, which is next to it. Betelgeuse in Orion's upper left "shoulder" is definitely tinted red, and so is Aldebaran of Taurus. You need to give your eyes a few minutes to adjust to the darkness, and you'll be able to pick out the colors quite easily.

When you find Orion, also look at Rigel, opposite from Betelgeuse in Orion's lower right corner. It will look bluish white, because it is a blue giant and very hot. You can't miss Sirius in Canus Major, just to the left and below Orion. It is very bright, and very white, again because it is a hot star. The stars do have different colors according to their temperatures, and the colors are due to the energy of the light, or wavelengths, caused by the temperature.

Stars are classified this way, as to spectral class. Since the sun is so close to us, we see it as white light but its surface is definitely yellow, and photographs of the sun taken from telescopes designed to view the sun safely show this.

You didn't ask this, but it might help: We see color based on what wavelength of light hits the cone cells of our retinas in our eyes, and so what wavelengths the stars emit is how we see them, and it is real, and much as I hate to disagree with another answerer, it IS how spectral classes are determined. It is all based on wavelength and, therefore, color. Look up the H-R diagram, and you'll see how this works.

FYI: Below red light is infrared. We cannot see these very long wavelengths of light, but we feel them as heat. Beyond that are radio wavelengths, which we also cannot see. Above blue light is ultraviolet, which is very energetic due to the extremely short wavelengths and, as we know better now, very harmful to the skin and to all life if it isn't filtered somehow, which is why the ozone layer in our atmosphere is so important. Ozone absorbs a lot of the ultraviolet radiation before it reaches the lower atmosphere.

As it happens, no. The effective temperature of a red giant will be between about 3500 and 4500 Kelvin. An incandescent light bulb has a filament temperature of around 3000 Kelvin. Light bulbs give off white light, so red giants also will.

A red giant is noticeably red, as the result of its photosphere being relatively cool. By contrast, the sun is classified as yellow, but in my opinion this is something of a misnome, since sunlight is effectively our standard for whiteness. Something appears white to us when and only when it reflects (or scatters, more accurately) all the sunlight incident upon it.

Yes, a red giant would be a firetruck red! It's the second stage of a star and usually lasts a long time

The short answer is no one really knows for sure. But scientists have come up with a number of theories. One of those theories is: yes it does.

But is that all just conjecture? Perhaps

Yes, quite red.

A red dwarf though appears white. Go figure.

Its all about SURFACE TEMPERATURE not spectral class.

look, if Superman is uncovered to the mild of a pink time-honored, Kryptonite would be no worse for him than coal, or something you are able to think of of. whilst Superman is uncovered to the mild of a pink time-honored, he loses his powers (that are, certainly, brought about by utilising the mild of a yellow solar,) and turns into very comparable to how he replace into at delivery, no longer in possession of any staggering powers. in this state, Superman should not be laid low with green kryptonite. Sorry if I ruined your "disclose-Superman-To-the two-green-Kryptonit... plan, Lex. seems such as you will might desire to circulate back to easy ol' one-or-the-different-ing.

Yes it would be red