What Can Be Said With Certainty About A Red Star And A Blue Star?

What Can Be Said With Certainty About A Red Star And A Blue Star??

What can be said with certainty about a red star and a blue star? The blue star is hotter than the red star. You just studied 100 terms!

Which is a difference between a red star and blue star quizlet?

The red star is more massive than the blue star. -The blue star is hotter than the red star. White dwarfs lie on the lower left portion of the H-R diagram. … The star’s apparent magnitude is smaller than its absolute magnitude.

Which is hotter a red star or a blue star quizlet?

The blue star is hotter and the red star is more luminous. … They have the same luminosities and temperatures.

Does a blue star have a higher surface temperature than a red star?

The surface temperature of a star determines the color of light it emits. Blue stars are hotter than yellow stars which are hotter than red stars.

Which is hotter a blue star quizlet?

Star A is larger in diameter because it is a blue star Blue stars tend to be larger and hotter.

Is a red star closer than a blue star?

Blue stars tend to be the brightest and red stars the dimmest. But more experienced observers will encounter red stars at night that are brighter than white or blue ones. … Thus a red star that shines faintly but is very close will appear to shine more brightly than a blue star that is much further away.

Why are cooler stars red and hotter stars blue?

Cooler stars emit much of their light in the red part of the spectrum so you see them as red. … Even hotter stars emit most of their light in the blue and ultraviolet so you see them as blue-white.

Why is a blue star hotter than a red star and not the other way around like the faucets in your bathroom )?

The Sun (and every star) is in hydrostatic equilibrium. … Why is a blue star hotter than a red star and not the other way around (like the faucets in your bathroom)? Because the blackbody raditation curve of otter objects peak at shorter wavelengths. What can astronomers learn about starts by using spectroscopy?

Which color star is the hottest quizlet?

Blue or white are the hottest and red is the coolest. Our own star the Sun is nearly in the middle of both the temperature and luminosity scales relative to other stars. This puts it around the middle of the diagonal line.

What is the correct order of stars from hottest to coolest?

The seven main types are M K G F A B and O. M stars are the coldest stars and O stars are the hottest. The full system contains other types that are hard to find: W R N and S. The closest star to the Earth the sun is a class G star.

Which star has a higher temperature?

Type O stars

Spectral types are a measure of the surface temperatures of stars and are letter designations: O B A F G K and M. Type O stars have the highest surface temperatures and can be as hot as 30 000 Kelvins. On the other extreme type M stars have the lowest surface temperatures and can be as cool as 3 000 K.

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Is a red star hotter than our sun?

Red stars are cooler than the sun with surface temperatures of 3 500 K for a bright red star and 2 500 K for a dark red star.

Which do you think is hotter a red star or a blue star explain it using the concept found in electronic structure?

Well to answer this a shorter wavelength means greater energy. This is important because if you look at the spectrum blue photons have more eery than red photons so the blue star generates more energy and more heat than the red. To answer simply the red stars are lower in temperature than the blue stars.

Does red light have lower energy than blue light?

This diagram shows the relative wavelengths of blue light and red light waves. Blue light has shorter waves with wavelengths between about 450 and 495 nanometers. Red light has longer waves with wavelengths around 620 to 750 nm. Blue light has a higher frequency and carries more energy than red light.

Which is hotter a blue star an orange star a yellow star a green star a red star?

Temperature – cooler stars are red warmer ones are orange through yellow and white. The hottest stars shine with blue light. Age – As a star ages it produces different chemicals which burn at different temperatures. We can use a star’s color to show its relative age.

Why is it that your hot water faucet is labeled red but your cold water faucet is labeled blue?

Blue stars are hotter. Their radiation curve peaks at a shorter more energetic wavelength or higher frequency. Water faucets are often labeled with a red dot for hot water and a blue dot for cold. … Given that bluer objects are hotter than redder for blackbodies it is backward.

Why are some stars blue and red?

The color of a star is linked to its surface temperature. The hotter the star the shorter the wavelength of light it will emit. The hottest ones are blue or blue-white which are shorter wavelengths of light. Cooler ones are red or red-brown which are longer wavelengths.

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Why are red stars red?

The color of a star comes from the temperature of its surface. The hottest stars are blue cooler stars are white and yellow and the coolest stars of all are red. A star that emits mostly red light will have a surface temperature of about 3 500 Kelvin. …

What star is red in the sky?

Mars will be at its brightest and best fiery red color. Now is a good time to start watching for Mars in the night sky. Mars will look like a bright red star although it shines with a steadier light than the twinkling stars. Mars rises in the east at mid-to-late evening.

Why do you suppose we associate the color red with hot and the color blue with cold in everyday life?

We associate red with hot and blue with cold most likely because humans learned that red and yellow flames from fires were hot and hot objects like coals get hot enough (a few thousand Kelvin) to glow red or orange. Objects hot enough to glow blue would probably be vaporized and are encountered much less often.

Why is red light warmer than blue?

Red light has a longer wavelength than blue light this means blue light has a higher frequency than red light. Since there is more energy in higher frequencies theoretically blue light is warmer than red light.

What relationship do you see between star color and temperature?

There is no relationship of a star’s color and temperature. Red/Orange stars are the coolest and blue stars are the hottest As stars grow hotter their temperature changes from Red/Orange to Blue.

Which of the following is the coolest star or a red star?

You can tell a lot about a star by its color. You can tell the temperature of the star. Red stars are the coolest. Yellow stars are hotter than red stars.

Is the Sun AK class star?

The Sun is a class G star these are yellow with surface temperatures of 5 000–6 000 K. Class K stars are yellow to orange at about 3 500–5 000 K and M stars are red at about 3 000 K with titanium oxide prominent in their spectra.

Why blue star is the hottest?

The surface temperature of Eta Carinae is 40 000 Kelvin and it shines with much of its radiation in the ultraviolet spectrum. … So remember blue stars are blue because of the temperature of their surface. And they’re so hot because blue stars are much more massive than cooler stars like our Sun.

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What color is our Sun?


The color of the sun is white. The sun emits all colors of the rainbow more or less evenly and in physics we call this combination “white”. That is why we can see so many different colors in the natural world under the illumination of sunlight.

Are blue stars more luminous?

It is telling us that a star’s color (or temperature) and its luminosity are related. Blue stars are more luminous than red stars.

What does the color of a star tell you about a star?

A star’s color provides a direct measurement of its surface temperature the hottest stars shine blue-white while the coolest are dull orange or red. In turn the temperature indicates how much energy a given area of the star’s surface radiates into space every second.

How would you describe the brightness and temperature of main sequence stars?

Describe the general trend between temperature and luminosity that the Main Sequence shows. A hotter star should be brighter than a cooler star. … Although they are cool [red] they are very luminous and therefore bright. In the Main Sequence stars that are cool are not as luminous.

Which of the following choices lists the colors of stars from hottest to coolest *?

(Notice that temperature is related to color and follows the order of the colors in the rainbow: Blue (or violet) stars are the hottest while red stars are the coolest.)

What is the correct order of the stars?

As the work progressed the types were rearranged in a nonalphabetic sequence to put them in order by surface temperature. From hot stars to cool the order of stellar types is: O B A F G K M.

What Colour are stars?

Stars have different colors which are indicators of temperature. The hottest stars tend to appear blue or blue-white whereas the coolest stars are red.

Who is the hottest star?

The hottest known star WR 102 is one such Wolf-Rayet sporting a surface temperature more than 35 times hotter than the Sun.

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