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What temperature does the sun have to be when it can burn things with a magnifying glass?
Wiki User
∙ 12y ago
The sun is always the same temperature. It is the focusing of the sunlight into a narrow spot that generates enough heat to ignite flammable materials. Even an ordinary pocket magnifying glass will do it.
It is the focusing that is the trick. It concentrates all the heat that would have been spread over several sq inches, into a tiny spot - less than 1/10 inch diameter. So assume a lens diameter of 4 sq inches, and a focused spot of 1/10 a square inch, the energy concentration is 300+ times.
Wiki User
∙ 12y ago
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Can you get a 3rd degree burn from the sun?
No, unless you are 'trying' to. The sun usually leaves first degree, but if you use a magnifying glass, it can.
How does a concave mirror focus light?
Concave mirrors used to focus light on a point, such as in a solar collector, would be in the shape of either a Hyperbolic or Parabolic section. The reason for the xxxxbolic section is that they both have focal points (foci?). any light coming into the mirror at any angle is reflected to this focal point. Think of using a magnifying glass to burn ants... you need to move the glass higher or lower to the ground until you get that bright dot of concentrated light/heat and then you can burn ants. The small white dot of light/heat is the focal point of you magnifying glass. Hope that helps..
How could acid clouds affect temperatures?
acid can burn through things, its probably hot ^acids do not burn things through heat Assuming that the reaction is spontaneous (happens by itself), it would give off heat, though probably not much. On a large scale, I would bet that an acid cloud would have the same effect as a normal cloud on temperature.
Is the sun burning the earth?
In a sense yes because if you see heat from the sun has caused things such as forest fires and grass to crisp. Take a piece of glass and try to have the sun beam on it and it will burn the grass which proves it is burning the Earth.
How do you burn a hole with a magnifying glass?
It actually depends on what you're trying to burn a hole through. It can from a thin piece of paper to a large block of wood. I have only tried it for paper, and this is what I did: You make a spot on the piece of paper where you want it to burn. Try using a black sharpie because it attracts more heat. Take a typical magnifying lens and hold it between the sun and paper. There should be a weird shape, or dash of sunlight on your mark of sunlight. Make sure the light is refracted right, and is not spread out, but more focused to one point. It all depends on the weather or season really. During the summer, you can go outside and try it, and it will happen pretty fast. For the winter (which I tried), I was inside, in front of a mirror. I had to wait patiently for a few minutes, and the sun was moving by the hour, so I had to make sure my angle was correct. Hope this helps :D
Why couldn't the US get a big magnifying glass or something like that to keep the temperature warmer in the winter?
A big magnifying glass will burn the US, one neighborhood at a time.
How does a plant burn when a magnifying glass and the sun join?
If you mean to ask how a magnifying glass can use sunlight to burn a plant, then here's how.A magnifying glass focuses the light going through it so that it all converges into a single point (focal point). The light that would have otherwise been spread out over the area of the magnifying glass is "concentrated". Therefore there is much more energy hitting that one point than otherwise would be. The light raises the temperature of the plant to the point where it will burn.
Can a hot day burn wood?
With a magnifying glass
What is the best material to burn with a magnifying glass?
dried leaves or paper
Why do ants burn under a magnifying glass?
When you place a magnifying glass over an ant and the sun is out, the light from the sun hits the convex glass and becomes concentrated at a certain point. That point will eventually become hot enough to burn the ant.
Why do objects burn when light shines through a magnifying glass?
well usually you need something stronger then a magnifying glass, but it increases the heat from the sun and burns something in its radius
How long does it take to burn a paper using magnifying glass?
It depends on the color, so i can't answer that.
Why does a magnifying glass must be held so that the light from the sun forms a circular dot to burn paper?
A magnifying glass forms a circular dot where it focuses rays of light from the sun. The focus of a magnifying glass is at a distance from the surface of the glass itself. So a magnifying glass must be held [approximately] perpendicular to the line joining the sun and the target, and at a distance from the target which equals the focal length of the lens.
How do you make a worm blow up?
Magnifying glass or cook it maybe, or just try to burn it in someway.
Could you burn an ant with a magnifying glass?
Yes. When the sun hits the convex glass, the rays are concentrated into one point. that point heats so fast that anything the beam hits, it'll burn.
Can you get a 3rd degree burn from the sun?
No, unless you are 'trying' to. The sun usually leaves first degree, but if you use a magnifying glass, it can.
Why must you look at the sun indirectly instead of directly?
If you look directly at it, it will burn your retina, like a magnifying glass burning ants.
