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I want to know how much lux the sun emits on a bright day - I don't mean when one stares directly at the sun, but rather when one walks casually outside when the sun is shinning brightly. Now the
Dec 26, 2014 · 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.
Mar 20, 2019 · Approximating the sun as a black body effectively means that it's surface temperature is 5800K. And, indeed, if we look at the most dominant wavelength of the sun spectrum, the maximal intensity comes from green wavelength which corresponds to a black body emitting radiation at a temperature of 5800K.
Feb 15, 2011 · Do you want to know both how the Earth-sun distance is measured and how the speed of light is measured? Those are completely different things. As I asked before, separate threads, please.
Sep 2, 2020 · We all know that the sun generates its energy from nuclear fusion in the core. The electromagnetic radiation produced slowly travels upwards, while constantly being absorbed and re-emitted by the charged ions, until it reaches the photosphere, where it can basically travel freely (because there are less charged ions), until it travels out into ...
If this is the case, then when we read things like what time sun sets and rises on websites, books, calendars, other official times, et al… does that mean when we see for example ‘sun set at 18:35’ is the time denoting the actual sun set taking into account of the mirage or what is visible to us.
I was thinking about elementary physics today and realised: We learned and proved that sunlight is white. But i don't understand why when you look at a picture of a satellite orbiting the sun , it (the sun) seems yellow-orrange. How could this be? It is like there is a red light bulb in the room but what you see is green.
Nov 10, 2023 · The Sun's energy comes primarily from fusion of light elements in its core. It is estimated that a very small fraction of mass of the Sun (~ 10−12 times the abundance of hydrogen) is uranium (both 235 and 238 isotopes). But given the huge mass of the sun (~ 2 ∗1030 kg), the mass of uranium in sun will come to around 2 ∗1018 kg, which is ...
Apr 26, 2016 · So how far has earth moved towards or away from the sun in these 4.5 billion years? Now perfect balance between the centrifugal force of orbital rotation and sun's gravity is impossible so the earth's orbit should either be slowly decaying inwards or expanding outwards due to difference in magnitude of those opposing forces.
Feb 22, 2017 · The term "solid objects" is a rather vague definition. I will try to break it down into categories and try to answer individually. But right at the beginning I can tell that the colour change observed in materials is mostly a result of chemical changes induced by UV light from the sun. By chemical changes I mean three main mechanisms; breaking of chemical bonds, formation of radicals or light ...
