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- How much lux does the Sun emit? - Physics Stack Exchange
When you look 'at the world' (i e to the horizon) on a clear day, unlesss the sun is at a very low angle, the surface of your eye is not illuminated directly by the sun, only reflected sunlight from the atmosphere, ground and objects The 32,000-100,000 lux figure is referring to a horizontal surface illuminated directly by the sun
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- everyday life - Why do sunbeams diverge even though the sun is much . . .
The same applies to the beams of light above them The Sun is very far away and the beams are pretty much parallel, but they're pointing towards you, and perspective makes them appear to converge towards the vanishing point - which in this case is the Sun's location in the sky The technical term for these beams is "crepuscular rays "
- astronomy - How big a coincidence is the Sun and Moon having almost . . .
Note that every moon with diameter i will block the sun in 201-i different orbits The smallest moon will block the sun in only one orbit, LEO The probability of a moon 2000 miles in diameter is thus $\frac{1}{200^2}$ that of the smallest moon Then the probability that a moon will block the sun is:
- How can sunlight be white , but pictures of the sun be orange?
The Sun is white, but the reason why it is white is because your brain adjusts the white balance to make the totality of all the ambient light illuminating the objects you see, white Now, the Sun is too bright to look directly at safely, but around dusk or dawn you can sometimes see by accident a glimpse of it, and it then looks red
- How is distance between sun and earth calculated?
Another way of calculating the earth - sun distance is to look at the centrifugal and the gravitational force This solution assumes that one already knows the mass of the sun, but thats a different problem ;-)
- photons - Light formed by the sun? - Physics Stack Exchange
Hydrogen atoms fuse to form helium At the same time, lots of of gamma photons and neutrinos are produced The photons take thousands of years to "fight" their way to the surface of the Sun, but then escape into space as visible or near visible photons at the speed of light I am really confused about how the sun produces light
- temperature - What causes the perceived intensity of the sun to change . . .
When you feel "heat" from the Sun, what you're actually feeling is the infrared radiation that the Sun emits The reason infrared radiation feels hot is because your body is mostly water, and infrared radiation tends to vibrate the bonds of water molecules
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