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CF has always been a site that welcomes people from different backgrounds and beliefs to participate in discussion and even debate. That is the nature of its ministry. In view of recent events emotions are running very high. We need to remind people of some basic principles in debating on this site. We need to be civil when we express differences in opinion. No personal attacks. Avoid you, your statements. Don't characterize an entire political party with comparisons to Fascism or Communism or other extreme movements that committed atrocities. CF is not the place for broad brush or blanket statements about groups and political parties. Put the broad brushes and blankets away when you come to CF, better yet, put them in the incinerator. Debate had no place for them. We need to remember that people that commit acts of violence represent themselves or a small extreme faction.
Apod
- Thread starter 2Timothy2
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I just follow Christ.
http://antwrp.gsfc.nasa.gov/apod/ap040913.html
Here's a link to the problem.
My initial reaction is that it's the result of a finite coherance length in the light. The picture would have been taken of a material with some refractive (and obviously reflective) properties, and the colors would come because different wavelenghts have different coherance lengths. Of course, I would then expect to see SOME diffraction pattern in the middle, but perhaps the medium is too imperfect for that?
Outside the ring, the surface reflection remains but constructive interferance is impossible, so it doesn't show up.
I'm pretty sure I'm wrong as it doesn't QUITE hold up (doesn't look like coherance effects I've seen before for example), but that's my initial thought.
Here's a link to the problem.
My initial reaction is that it's the result of a finite coherance length in the light. The picture would have been taken of a material with some refractive (and obviously reflective) properties, and the colors would come because different wavelenghts have different coherance lengths. Of course, I would then expect to see SOME diffraction pattern in the middle, but perhaps the medium is too imperfect for that?
Outside the ring, the surface reflection remains but constructive interferance is impossible, so it doesn't show up.
I'm pretty sure I'm wrong as it doesn't QUITE hold up (doesn't look like coherance effects I've seen before for example), but that's my initial thought.
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The unusual image should be called a GLASS BOW. This is what you would see if rain drops were made of glass. In this case a rainbow results from refraction and reflection of light in spherical water drops. There are, in general, two rainbows: the primary, and the secondary bow. You can see both bows in various pictures by googling Glass Bow.
Sunlight of all colors strikes zillions of water drops. Each water drop reflects a cone of light back into the direction of the sun. This cone is red on the outside and has a cone angle of about 84 degrees The violet light is further in (cone angle of about 80 degrees). Inside the violet cone, the water drops reflect all colors at roughly equal strength; the light inside the cone is therefore white (reflected sunlight).
When the sun is behind you, and you are looking at rain or water from a fountain or from a waterfall, zillions of water drops will each do their own thing, and the result is that you will see a rainbow. If you measure the angle between the shadow of your head (this is the direction 180 degrees away from the sun) and that of any point of the red circle of the primary bow, you will find about 42 degrees (half of 84). You will see the red on the outside of the bow, violet on the inside, and white light inside the bow. The sky is distinctly darker outside the bow than inside.
See HERE.
Sunlight of all colors strikes zillions of water drops. Each water drop reflects a cone of light back into the direction of the sun. This cone is red on the outside and has a cone angle of about 84 degrees The violet light is further in (cone angle of about 80 degrees). Inside the violet cone, the water drops reflect all colors at roughly equal strength; the light inside the cone is therefore white (reflected sunlight).
When the sun is behind you, and you are looking at rain or water from a fountain or from a waterfall, zillions of water drops will each do their own thing, and the result is that you will see a rainbow. If you measure the angle between the shadow of your head (this is the direction 180 degrees away from the sun) and that of any point of the red circle of the primary bow, you will find about 42 degrees (half of 84). You will see the red on the outside of the bow, violet on the inside, and white light inside the bow. The sky is distinctly darker outside the bow than inside.
See HERE.
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pgp_protector
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Is it Beaker from the Muppet Show?
Ok, now I'm worried about my self.
I was thinking Beaker with a Camera.
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That's what I was thinking too.Ok, now I'm worried about my self.
I was thinking Beaker with a Camera.
It looks like he's standing behind a rock or something.
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