Using reflection is it possible to light up a room completely with only one candle?
489404
yes...but u must know the angle of incidence and angle of refraction...light up a candle and place a mirror opposite to it in a room at an angle so tat u can see the candle.then keep other mirror at a place where u can see the first mirror and the candle... continue the process till u get sufficient light. try to place mirrors in the ceiling to get better light.
753725
I assume the goal is to achieve a specified level of illumination and pattern (uniform perhaps?). Consider the light output of the bulbs and the distance from the area to be illuminated (does the room have high or low ceilings?). Consider the type of bulb and lamp structure as to how much of the bulb output is directed toward the desired area. I'm not aware of any simple formula.
737848
Yes, the whole point of the tinsel is to reflect the lights!
322164
Seriously, you are all thinking too hard. The answer is the easiest, and obvious one that your teacher is looking for. Trust me.\n\nHave the trap faced away from the candle. That is, that when it is sprung, the motion is away from the candle. Before setting the trap, tie one end of a 40in long piece of string to the arm, the other end to the candle. Then, set the trap and place it one meter away,(the string will now be tight). When the candle is lit, and the trap is sprung, it will jerk the candle away. The fast motion of the candle through the air will blow it out.\n\nSimple huh? Your teacher isn't looking for how fancy or inventive you can be, but how you can demonstrate simple efficiency. Or a lesson in common sense.
436768
it is only an infinite refrexions of light. the device used to do it is called KALEIDOSCOPE
863993
your best bet, would be to get extra fuse and fuse them together one after the other, then you only have to light once.\n\n"BE SAFE AND PREPARED"
1082248
the most purest form of generating light without heat is utilized by certain creatures that "glow in the dark".  it is called "bioluminescence".  ( e.g. fireflies , luminescent bacteria etc ).  they use certain chemical reactions to produce light.\n\ncyclotron radiation also does this ( but a abstractly difficult concept to understand ).\n\ntheoretically, however, the second law of thermodynamics states that all energy transformations must "waste" a certain portion of the transformation as entropy ( or heat ) .  this is unavoidable and so ANY method of generating light MUST involve a loss in the form of heat.\n\nhope it answered your most delightful question :)
1001733
It sounds like you are creating a basic electrical circuit. with the batteries, wires, bulbs and paper clip you can make either a series or parallel circuit. The light bulbs will light up when you have a complete single loop for series. When you measure the current it should be the same anywhere on the circuit. In a parallel circuit you are splitting the circuits into three or more branches, with one bulb on each side. When measured each branch should be using half the current. You shouldn't have any problem finding a site online that shows this experiment. use keywords, including science experiments for kids. I found the experiment in Reader's Digest,"How Science Works"
1155530
hmm well ethanol is flammable anyway so you could just put some in a container and light it on fire. I don't think it would make a very good candle though. Probably wouldnt be very good to breathe in either. I think they make a kind of ethanol gel you could use too.
522524
The light is reflected
989141
That depends on what you call lighting the room. It is plausible I suppose, but I doubt a 3 cm circle of light would have enough light to do it. In order to get normal light for a mid sized room you will need 2400 lumens or more in that 3cm. That is at least 3 light bulbs.  \n\nMirrors are prefectly suitible way of spreading the light. They don't have to be perfect reflectors either. Concave mirrors would probably work better than flat as they would direct the light to the next mirror better.
474124
either your teacher is nuts or you probably know more about this than us. the bulb has to be a vacuum, and making a glass vacuum requires better equipment than most people have access to.
509360
Probably not.\n\nIt takes a very high temperature to get the colors you are talking about. The temperature of a candle is a lot less than those found in pyrotechnics or a bunsen flame.
757465
Yes.\n\nLight intensity is often measured in units known as candelas. This used to be called candlepower, and one candlepower was the amount of light shining one foot away from a candle. If you cast one candela on one square foot of area, you now have one lumen - the root of the term luminous. Your units (mcd) are millicandelas. For far more detail, see the link below:
704068
Say you shine a flashlight into a mirror. Then put a mirror behind the flashlight and remove the flashlight. Given that the 2 mirrors are exactly parallel, will the light just bounce back and forth forever? No - the light travels in waves and each time it reflects back, some of the light is not hitting the mirror exactly at 90 degrees and is reflected off on an angle. The light will reflect away and eventually dissipate completely. \nIf you try to trap light in a box, as it bounces off the walls inside, it will dissipate into energy (heat). The temperature of the inside of the box will raise - but just infintestimly so.\nRemember all of this will take place at the speed of light.
931718
You don't need to do anything to use a laser in a room. \n\nLasers are not ionising radiation and need no special treatment.\n\nBut you may need to do things to make the room suitable for your particular laser application. For instance, it needs to be vibration free for holography.
171185
use black light,u will find it in any good store