Why does early morning seem more blue ?

I was watching a drama on TV and an early morning scene came on that had that eerie blue kind of colour that I generally assimilate with early morning.

It got me thinking, why is morning blue and afternoon orange…? Is it just me that makes these assumptions…? The eyes are adjusting to the light as it changes from dark to light and vice versa….??? But then I realised I was looking through the perception of a camera and it still gave the aura of early morning.

Any ideas on what’s going on?

The air is cleaner in the morning.

@Agent80 Really…? I never knew that. Can you elaborate why that is?

Thanks Sammy but that doesn’t differentiate between dawn and dusk

Cause morning people use Olights and evening people like Nitcha?
(sorry, couldn’t help myself).

Blue light is more easily scattered as it travels through the air. More air to pass through at morning and evening.
And the morning sky can also have a red cast.
Here is link to a photo article about light tints.

And another reference

All the Best,

That looks interesting Jeff. Ill check it out, thanks :beer:

I always thought it’s more or less symmetrical.

Theoretically it should be symmetrical but even the first link Jeff provided says “there is no mathematical definition for magic hour (golden hour / blue hour)”.

So either I’ve been brainwashed into thinking this way or (more likely) it is more to do with location and weather conditions.

I live on the west coast so I’m guessing there is a difference in light shining over a land mass in the morning and over water in the evening. As mentioned by agent80 there is likely a difference in air quality too.

Thanks guys I have a better understanding now.

well, this morning was Pink.
no Blue to be found.
waiting on Zeta.

Since looking at light tints, I have noticed that my gray-gradient sunglasses tend to shift the daylight towards 6000-7000k, and amber gradient lenses tend to shift the daylight towards 4000k.

I could explain why you see more yellow in the morning, but blue… ?

Maybe it’s a “flat earth” thing… or a “pre/post coffee” effect? :stuck_out_tongue:

How about the doppler effect (red-shift) of the light from the Sun; in the morning we are moving toward the light, in the afternoon away from the light, and at high noon for a split second there is no doppler.

The air is cleaner overnight.

The brown color that develops during the day is photochemical smog — solar energy produces the brown tinted chemicals by reacting with the nitrogen oxides from combustion.

In an internal combustion engine there is enough heat to oxidize atmospheric nitrogen that is inhaled along with oxygen. So th exhaust gas is nitrogen oxides, carbon dioxide, and hydrogen oxide plus unburned hydrocarbons. Those are all transparent, but the nitrogen oxides once reacted by solar UV produce the visibly brown chemicals.

Have you noticed “low VOC” products becoming more widely availablle? The “volatile organic compounds” used as solvents also contribute to photochemical smog reactions.

Yeah, that’s easy. In the morning when sunlight is poured across the landscape like molten gold. It’s all about magic and the fact that magic slows down light.

@hank best explanation so far. Thanks.

i don’t know how big that hairy pig is, but it’s both cute and scary at the same time.

i hereby withdraw the doppler theory, but the sky color does shift from red to blue in the morning for the same reason that the sky is always blue during the day.

It most likely has to do with your true line of sight to the actual horizon at sea level. If you lived on an island in the middle of an ocean with no hills or mountains to your East or West the sun rise and the sunset would probably look identical. But if you live on land with mountains to your east or west even if they are many many miles away then you’re not seeing a true sunrise or sunset at sea level horizon views. So you missed the better colors in the direction of those mountains. Edit, the tilt of the earth and the season and your location on the Earth are also going to affect how much sunlight is passing through the atmosphere at sunset versus sunrise. But if you don’t have line of sight to the actual horizon (sea level) in both directions then that changes things drastically

Go to skymarvels.com and the Earth tilt sunrise sunset page for a better visual of this stuff and you can see where the Earth is currently seeing the setting and rising of sunlight on the globe.