How many watts of light does the sun let off every second?

Answer 1

The short answer is 3.827×10^26 W

The longer answer is:
Luminosity (Lsol) 3.827×10^26 W
~3.75×10^28 lm
(~98 lm/W efficacy)
Mean Intensity (Isol) 2.009×10^7 W m^-2 sr^-1

Answer 2

about 3 or 4

Answer 3

Watts are already a rate, so you wouldn't say that the sun lets off a certain number of watts in one second, you would just say that it gives off a certain number of watts, which would mean that it gives off that many joules in one second.

The total power given off by the sun is 3.826 x 10^26 watts. This means that the sun gives off 3.826 x 10^26 Joules every second.

The intensity of sunlight at the surface of the Earth is about 900 W/m^2. That means that every square meter of the Earth's surface (exposed to direct sunlight at noon) receives 900 Joules of energy from the sun every second.

Answer 4

Solar luminosity L is energy radiated per unit area per second is found using Stefan's law,

L = sigma(Stefan's constant)[temperature]^4 L is also related to SOLAR CONSTANT 'S' on earth

If R is radius of the sun and r is distance of earth from the sun ,

L(4piR^2) = S(4pi r^2)

L=Sr^2 / R^2 L=3.2*10^25 watt

Answer 5

In near orbit space, the sun's energy output is nearly 75 watts per square foot. Find the spherical surface area that the earth travels on, knowing that the radius of the earth's orbit is about one half of 93,000,000 million miles, and multiply that result by 75 watts.... That calculation should be close, plus or minus ten percent I would predict...the answer will amaze you and reveal to you how powerful the sun is.

Answer 6

(1,366 W/m^2)(149,600,000,000 m)^2 ≈ 3.057129856*10^25 Watts

Answer 7

You can't measure that in earthly units like watts. The numbers become astronomical, to large to express.

Answer 8

light is not measured in watts , power consumption is measured in watts. Light is measured in candlepower.

Answer 9

that is not fair .....you could have given us ten either side

Answer 10

too many