Up to last year, I never gained blinded by the sun in everyday instances (e.g. running towards it), at no time of the year I was. But because last christmas, it occured to me even more regularly that I cannot watch in the direction wbelow the sunlight is bereason it is so bright that it really damages me.My mother and also my roommate have actually oboffered the exact same phenomenon separately of me.

You are watching: Why is the sun so bright today

This, of course, is only anectodal proof, which is virtually worthmuch less. We all get older and we might have the exact same sort of "photophobia", or we just forobtained around being blinded the last few years and just now consciously felt an remembered it.

Because of this I want to ask this question: is there any objectively observable rise of brightness over the last few months and if so, why?


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asked May 15 "15 at 19:42
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user7268user7268
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The Sun"s luminosity is stable to 0.1% - it varies slightly in response to, or linked through, levels of solar magnetic task (Solanki & Unruh 2012).

This variation would not be perceptible and also is completely outweighed by the $pm 3.4$% variation led to by the non-circular orlittle bit of the Planet (the Sun is closest in January).

Obviously, if you live in the northern hemispbelow, then the Sun is generally greater in the skies now (in May) than it was in December. Its direct light is much less absorbed/scattered by the setting. This is a more perceptible result. It might change the visual brightness by tens of per cent, and also by even more in the brief wavesize blue part of the spectrum. That is the just physics-based explacountry I have the right to offer.


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edited Jun 6 "17 at 21:30
answered May 15 "15 at 21:22
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ProfRobProfRob
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is tright here any objectively observable rise of brightness over the last few months?

No. It"s totally your subjective perception that has adjusted.

The Sun is pretty cshed to a black-body radiator. That indicates the amount of power we receive from it depends on 2 factors: its temperature, and also its apparent size (the angular dimension of the solar disk as checked out from Earth).

The obvious size of the Sun has actually obviously not readjusted. Way also many kind of points would certainly go entirely haywire if that occurred - I"ll leave that as an exercise to the reader.

Its temperature has not readjusted either. This can be measured in assorted methods - yet there"s an additional way which is simpler: this being a black-body radiator, its temperature and its evident color are correlated. The shade of the Sun has actually not changed, obviously.

TLDR: The Sun is still working as it always had.

See more: Why Does This Always Happen To Me Lyrics, Everything Happens To Me


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answered Jun 6 "17 at 19:02
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Florin AndreiFlorin Andrei
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