1,358 reputation
517
bio website topjaklont.org
location Toronto, Canada
age
visits member for 3 years, 6 months
seen 2 days ago

I'm a Post-Doctoral Fellow in atmospheric remote sensing at the University of Toronto in Toronto, Ontario, Canada. I first came to Stack Exchange for practical reasons: Tex.SE has been of major help when I wrote my licentiate (midterm) thesis. Since then, I have discovered the joy of many websites. As my network profile will show, I'm interested in travel, outdoor, scientific skepticism, and as I work in academia, also in academia and LaTeX.


2d
comment Do rainbows have ultraviolet bands and infrared bands?
When you get a little bit into the UV, most of it gets absorbed in the ozone layer so it never reaches any altitudes where there are water droplets to reflect it.
May
12
comment Is true black possible?
@Baldrick Until dust settles on it after approximately 10 seconds of use.
Apr
17
comment At what energy consumption would we get a 1 degree rise in the Earth's temperature?
I think that probably the most productive approach would be to compare this heat dissipation to geothermal heat generation (which is around 0.1 W/m²), as it is of similar nature (a more or less constant internal heat source).
Apr
17
comment At what energy consumption would we get a 1 degree rise in the Earth's temperature?
Right. That assumption is very very far from the real world, so your calculation is interesting, but not very useful. As you already state in your answer anyway.
Apr
17
comment At what energy consumption would we get a 1 degree rise in the Earth's temperature?
You have to consider the oceans.
Apr
16
comment Why stars are white? According to Rayleigh Scattering
Rayleigh scattering goes with λ^-4 but Mie scattering does not necessarily do so — that's why the clear sky is blue, but clouds are white. Doesn't the observation that it does cause reddening require that the scattering particles are much smaller than the wavelength of the light — and that we are in the Rayleigh regime?
Apr
16
awarded  Explainer
Apr
16
revised Why stars are white? According to Rayleigh Scattering
Clarified according to my understanding of the question.
Apr
16
comment Why stars are white? According to Rayleigh Scattering
I don't think this answers what the OP meant to ask. Stellar light reaching an observer on Earth has exactly as much Rayleigh Scattering as light from our own Sun.
Apr
16
suggested approved edit on Why stars are white? According to Rayleigh Scattering
Apr
16
comment Why stars are white? According to Rayleigh Scattering
I believe this question is about the colour as perceived on Earth, where starlight certainly is affected by Rayleigh scattering as much as light from our own Sun.
Apr
16
answered Why stars are white? According to Rayleigh Scattering
Mar
13
comment Why are stars white?
The Sun appears yellow under a clear sky because of Raleigh scattering. Look at an overcast cloudy sky and sunlight will appear with the white colour it actually has.
Mar
13
comment Why are stars white?
It is very easy to verify that the Sun is white. Any cloudy sky will reveal that.
Mar
13
comment Why are stars white?
This answer is relevant, because it points out that the expectation to see yellow stars is due to the Earth's atmosphere. The last paragraph correctly answers the question.
Mar
4
comment Average surface temperature of Earth
That is the equivalent temperature (balancing the T⁴s), not the average temperature.
Mar
4
revised Average surface temperature of Earth
added 263 characters in body
Mar
4
comment Average surface temperature of Earth
@CarlWitthoft Because that heat source is only on the order of 0.1 W/m². I did not say that the lack of the atmosphere is the only difference. Earth is also heated from inside, by tidal heating, directly by humans, by meteorites entering, by sunlight reflected from the moon, and probably by other factors that are even smaller. All of the above have an effect that is tiny compared to the effect of the atmosphere.
Mar
4
revised Average surface temperature of Earth
added 333 characters in body
Mar
4
suggested rejected edit on atmospheric-science tag wiki