The lens can be placed in different positions to form a well-focused image of the candle flame on the wall. The number of positions depends on the type of lens and the distance between the lens and the wall.
The image of a candle flame formed by a lens is obtained on a screen placed on the other side of
If you want to form a well-focused image of a candle flame on a wall, you can place the lens in several different positions. The number of positions will depend on the size and shape of the lens, as well as the distance between the lens and the wall. For example, if you’re using a small, round lens and you’re standing close to the wall, you might be able to place the lens in four or five different positions and still get a good image.
If you’re using a larger, rectangular lens and you’re standing further away from the wall, you might need to place the lens in ten or more positions to get a good image.
Credit: www.417mag.com
How Hot is a Candle Flame?
Most candle flames are between 1,000 and 1,500 degrees Fahrenheit. The hottest part of the flame is the blue part in the center.
Why Do Candles Flicker?
When you light a candle, the heat of the flame melts the wax near the wick. This liquid wax is drawn up the wick by capillary action. The heat of the flame vaporizes any liquid wax drawn up the wick, which then recondenses on the part of the wick closest to the flame.
This liquid wax then diffuses the heat of the flame to vaporize more liquid wax, and so on.
The flickering you see is caused by small drafts in your room that disrupt this process. When a draft hits a lit candle, it causes some of the hot air around the flame to be blown away.
This makes the temperature aroundthe base ofthe flame drop for a split second. That causes someoftheliquidwax nearthewickto solidify, which temporarily blockscapillaryaction from drawing moreliquidwax upthewick. The result is a momentary flicker in
The other reason candles flicker has to do with oxygen levels neartheflame. If there isn’t enough oxygen present, combustion can’t occur andthecandle will start to smoke and produce soot (carbon deposits).
Conclusion
In this blog post, the author discusses how many different positions one can place a lens in order to form a well-focused image of a candle flame on a wall. The author states that there are an infinite number of positions that one could use, but there are only four that will produce a sharp image. The author provides detailed instructions on how to find these four positions.
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