A rainbow is an optical phenomenon caused by refraction, internal reflection and dispersion of light in water droplets resulting in a continuous spectrum of light appearing in the sky. The rainbow takes the form of a multicolored circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the Sun. Rainbows can be caused by many forms of airborne water. These include not only rain, but also mist, spray, and airborne dew.
Rainbows can be full circles. However, the observer normally sees only an arc formed by illuminated droplets above the ground, and centered on a line from the Sun to the observer's eye.
In a primary rainbow, the arc shows red on the outer part and violet on the inner side. This rainbow is caused by light being refracted when entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it.
In a double rainbow, a second arc is seen outside the primary arc, and has the order of its colors reversed, with red on the inner side of the arc. This is caused by the light being reflected twice on the inside of the droplet before leaving it.
Rainbows can be observed whenever there are water drops in the air and sunlight shining from behind the observer at a low altitude angle. Because of this, rainbows are usually seen in the western sky during the morning and in the eastern sky during the early evening. The most spectacular rainbow displays happen when half the sky is still dark with raining clouds and the observer is at a spot with clear sky in the direction of the Sun. The result is a luminous rainbow that contrasts with the darkened background. During such good visibility conditions, the larger but fainter secondary rainbow is often visible. It appears about 10° outside of the primary rainbow, with inverse order of colors.
To read a lot more, go here: https://en.wikipedia.org/wiki/Rainbow
Here are a some rainbow photos I took:
What's better than a well-seasoned juicy pork tenderloin? One that's wrapped up in bacon! Our Bacon Wrapped Pork Tenderloin is so good, just the smell of it cooking will make your mouth water!
- 1 (1-1/4-pound) pork tenderloin
- 1 teaspoon steak seasoning
- 4 bacon slices
- 1/2 cup apple jelly, melted
- Preheat oven to 375º. Coat a rimmed baking sheet with cooking spray.
- Sprinkle pork with steak seasoning on all sides. Wrap bacon slices around pork and place on prepared pan.
- Bake pork tenderloin 25 minutes, remove from oven, and brush jelly over pork. Return to oven and bake 5 to 10 more minutes, or until desired doneness.
- bird-watching
- studying birds
- educating others
- other bird-related activities
- A particularly important National Bird Day activity is bird adoption. According to the Atlanta Journal Constitution newspaper article, many bird enthusiasts celebrate by adopting birds on this day and educating future bird owners about the special issues involved with taking care of birds, including the “proper care, cleanup, noise and biting, feeding, diet and their need for daily interaction.”
There are approximately 10,000 species of birds.
HOW TO OBSERVE
- Pick up a bird identification book. It will help you to learn about species in your area and identify those frequenting your bird feeders.
- Enhance the attraction of your backyard. Add feeders, shelter and more. Learn what birds in your area like to eat and watch them flock to your sanctuary.
- Donate to a bird sanctuary or aviary dedicated to improving the survival of endangered birds.
- While you’re learning about all the amazing species, visit an aviary. A botanical garden, zoo, or conservation area may offer close up viewing of some of the more exotic species you’ve never seen before.
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