How many photons does a star emit?
How many photons does a star emit?
The team found that the amount of starlight, or the number of photons (particles of visible light) that stars have emitted throughout the history of the observable universe is 4×10^84 photons.
How many photons per second enter the stars eye?
About half a billion photons reach the cornea of the eye every second, of which about half are absorbed by the ocular medium. The radiant flux that reaches the retina is therefore ~2*10⁸ photons/s.
How do you calculate photons per second?
According to the equation E=n⋅h⋅ν (energy = number of photons times Planck’s constant times the frequency), if you divide the energy by Planck’s constant, you should get photons per second.
Do stars have photons?
All stars are just vast balls of hot plasma. These photons of energy are trapped inside the star and have to get out. Over a journey that can take more than 100,000 years, the photons are continuously emitted and then absorbed by atoms in the Sun. Each of these jumps can cause the photon to lose energy.
How many photons per second would the telescope collect?
Well, each of our 8 inch telescopes are collecting 700000 photons a second from the distant star. 700000 photons per second = 2.779*10E-13 joules per second.
How many photons strike the surface per second?
The answer is approximately 10^45 photons every second. That’s ALOT of photons.
How many photons are emitted per second by a 60 watt bulb?
1. 8×1019.
How many photons are there?
In a paper published in the journal Science, researchers led by Marco Ajello from the Clemson College of Science in South Carolina, US, report that the total number of photons produced in the 13.7 billion years since the Big Bang is 4×1084.
How many visible light photons does the bulb emit per second?
So, in order to emit 60 Joules per second, the lightbulb must emit 1.8 x 1020 photons per second. (that’s 180,000,000,000,000,000,000 photons per second!)
How many times more light can your eye gather after it expands its aperture?
When you move from a bright area into darkness, the pupil in your eye can expand from less than 1/1 6 inch to more than o inch in diameter — becoming sixteen times greater in area — in order to take in more light.
Do stars really produce that many photons per second?
The answer is simple: Yes, stars really do produce that many photons. This calculation is a solid (though very rough) approximation that a star the size of the sun might emit about 1045 visible photons per second (1 followed by 45 zeros, a billion billion billion billion billion photons). You can do the calculation: If you’re 10…
How can I calculate the number of photons emitted per second?
How can I calculate the number of photons emitted per second? According to the equation E = n ⋅ h ⋅ ν (energy = number of photons times Planck’s constant times the frequency), if you divide the energy by Planck’s constant, you should get photons per second.
Is the light from a star a hail of photons?
The light from the star is not a hail of photons but instead the star is transferring energy to the photon quantum field and this energy spreads out radially and evenly.
Why can’t we see stars that are far away?
You can only see the stars that have a lot of photons reaching your eye. If a star were so far away that photons were reaching your eyes only occasionally then the star would be too dim for you to see in in the first place. Even if you could see the photons, the star would appear to blink.
