Up to last year, I never gained blinded by the sun in daily instances (e.g. running in the direction of 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 where the sun is because it is so bbest that it really harms me.My mother and my roommate have actually oboffered the very same phenomenon individually of me.

You are watching: Why is the sun so bright today

This, of course, is just anectodal proof, which is practically worthless. We all obtain older and also we may have the very same kind of "photophobia", or we simply forgot around being blinded the last few years and simply now consciously felt an remembered it.

Because of this I want to ask this question: is tbelow any kind of objectively observable rise of brightness over the last few months and also 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 steady to 0.1% - it varies slightly in response to, or associated with, levels of solar magnetic activity (Solanki & Unruh 2012).

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

Obviously, if you live in the north hemispbelow, then the Sun is mostly higher in the sky now (in May) than it was in December. Its direct light is much less absorbed/scattered by the atmosphere. This is an extra perceptible effect. It could adjust the visual brightness by 10s of per cent, and also by also even more in the short wavelength blue part of the spectrum. That is the only physics-based explanation 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 type of objectively observable increase of brightness over the last few months?

No. It"s completely your subjective perception that has actually readjusted.

The Sun is pretty close to a black-body radiator. That indicates the amount of energy we receive from it depends on two factors: its temperature, and its noticeable dimension (the angular size of the solar disk as viewed from Earth).

The evident size of the Sun has obviously not adjusted. Way as well many kind of things would go completely haywire if that taken place - I"ll leave that as an exercise to the reader.

Its temperature has not readjusted either. This can be measured in assorted means - but there"s one more way which is simpler: this being a black-body radiator, its temperature and also its obvious shade are associated. The shade of the Sun has actually not adjusted, obviously.

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

See more: Ranking The Best Teams To Use In Madden 16 Ratings Reveal Best Teams In The Nfl


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