Sunset over the Grand Teton

The Physics of Sunsets – Starts With A Bang

The Physics of Sunsets – Starts With A Bang.

Image credit: Tamas Ladanyi (TWAN), over Lake Balaton, Hungary.

The first and most obvious is the change in coloration of the Sun, as well as a severe drop in the Sun’s brightness. On an airless world like the Moon, the Sun at sunset would look no different than at any other time. But it’s the Earth’s atmosphere that makes sunsets so special.

Image credit: Bob King of http://astrobob.areavoices.com/.

When the Sun appears progressively lower and lower on the horizon, its light needs to pass through more and more of the atmosphere to reach our eyes. You might not think of the atmosphere as being a very good prism, but when you pass through around 1000 miles of it just before the Sun dips below the horizon, it starts to add up.

Image credit: Pete Lawrence (Digital-Astronomy).

The bluer wavelengths of light get scattered away, leaving only the reddest wavelengths that reach your eye. As the sun drops towards the horizon, it progressively loses violets and blues, then greens and yellows, and finally even the oranges, leaving only the reds behind.

You may not even realize it, but by time you’d see a sunset like the picture above, the Sun has already technically set, it’s only due to the fact that the atmosphere bends light that we’re still seeing it like this.

Image credit: R Nave of Hyperphysics, from http://hyperphysics.phy-astr.gsu.edu/hbase/atmos/redsun.html.

This is why, if you time a sunset, it will take longer than the expected 120 seconds to go from the moment it touches the horizon to the moment it dips below, even during the equinox at the equator, where it rises and sets as close to completely vertical to the horizon as possible. The Sun appears to linger due to the refraction of our atmosphere.  READ MORE………

Sunday Snippets–A Catholic Carnival

Hello, and welcome. We are a group of Catholic bloggers who gather weekly to share our best posts with each other. Join us to read and contribute if you like. Make sure that post links back to Sunday Snippets–A Catholic Carnival. Don’t forget to leave a link to your post on our host, at RAnn’s site, This, That and the Other Thing.

Here are my contributions from the past week:

2012 Landscape Dreams Photo Contest Winners

Babe of All Perfection

Prayer to the Powerful Babe

The Shawl of Prayer

Rejoice! Gaudete

2012 Landscape Dreams Photo Contest Winners

Thank you to all who voted in the contest, especially if you voted for my sister’s entry or mine.

My sister, Bernadette Buechler, is  First Prize Winner. Go Sis!

Here is her photo entitled:

“Sunset Tapestry Over White Sands:

Sunset Tapestry Over White Sands by Bernadetter Buechler

20121221-214133.jpg

Also a winner, yours truly. Again thank you for your vote.
I am listed as “Lelander” in the winners list, but honestly, that’s me, and that is, NELANDER, thank you very much!

Here’s my winning photograph, entitled:

“Sunset Majesty”

Here’s the list:

20121221-214624.jpg

Visit Bernadette’s Willowtree Studio here.

Update:Photo Contestant (Me) Needs Your Vote or Vote for My Sister

Landscape Dreams Photo Contest. Please VOTE!

Sunset Majesty

 Sunset Majesty

 Sandia Dreaming

Sunset Before the Storm

OR

You might like to vote for my sister, Bernadette Buechler’s entry: Sunset Tapestry Over White Sands

 

Update:Photo Contestant (Me) Needs Your Vote or Vote for My Sister

I’ve entered Landscape Dreams Photo Contest and I would appreciate your vote.

If you like my either of my entries, please do me the honor of voting for it. Clicking on the picture and sign in.  When the link takes you there, it asks you to log in-you say yes-then it asks if you want to do it though facebook-yes to that-then it gives you an app for facebook-you just hit cancel on that and then -finally you get to input your login for facebook and get to the picture- there is a tab that says “vote for this entry”-, hit that and then it should work and of course the number of votes go up by 1vote by hitting the VOTE button:

Sunset Majesty

 Sunset Majesty

 Sandia Dreaming

Sunset Before the Storm

OR

You might like to vote for my sister, Bernadette Buechler’s entry: Sunset Tapestry Over White Sands