Credit & Copyright: Todd Sladoje
Explanation:
Why would a cloud appear to be different colors?
A relatively rare phenomenon known as
iridescent clouds can show unusual colors vividly or a whole
spectrum of colors simultaneously.
These
clouds
are formed of small
water
droplets of nearly uniform size.
When the Sun is in the
right position or mostly hidden by thick clouds,
these
thinner clouds significantly
diffract sunlight in a nearly coherent manner, with
different colors being deflected by different amounts.
Therefore,
different colors
will come to the observer from slightly different directions.
Many clouds start with uniform regions that could show
iridescence but
quickly become too thick, too mixed,
or too far from the Sun to exhibit
striking colors.
This iridescent cloud was photographed through a
polarized
lens above
Dublin,
Ohio last week.
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Январь Февраль Март Апрель Май Июнь Июль Август Сентябрь Октябрь Ноябрь Декабрь |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Публикации с ключевыми словами:
clouds - облака - дифракция света
Публикации со словами: clouds - облака - дифракция света | |
См. также:
Все публикации на ту же тему >> |