2007-01-02 12:19:28 · 16 answers · asked by vanessa p 2 in Science & Mathematics ➔ Physics
I know that that light is measured in candeliar and that the amout of light is dependant over distance and angle from the source. Such as elux=candeliar/distance squared and that mirrors are used to create lighting effects. Another factor is that some mirrors absorbed a lot of the energy that light rays produce were as more efficent mirrors would absorbed less. If your mirror is 5 meters away then the light reflected would not be that noticeable at all as the amount reflected would be no more than 25 less than the source. So a mirror therefore would not increse the amount of light produce but just reflect a small amount that is there. By the way if its an angle included you need use pythagoras work out the angle and use it in the equation.
2007-01-03 05:32:48 · answer #1 · answered by Anonymous · 0⤊ 1⤋
If the mirror were not there, an object was receiving light direct from the candle.
By making the mirror reflect light on that object, the object receives now light direct from the candle as well as reflected by the mirror.
Thus the object receives more light due to the presence of mirror.
In film industry and in photo- studios, the principle of reflection is used effectively.
However, the total amount of light in the room at any instant will be always equal to the difference between the emitted amount and absorbed by substances present in the room.
A good mirror absorbs only 20% of the light incident on it; reflects 80% of light.
2007-01-02 12:42:47 · answer #2 · answered by Pearlsawme 7 · 0⤊ 1⤋
The unit for measurement of the amount of light energy is Lumen. But the unit of intensity of light is Lux i.e lumens/sq M.
Now when you put a candle in a completely darkened room and it produces X Lumens of light energy, there is no way this energy can be increased.
What a mirror can do, however, is to reflect the light energy going in say, north direction to south. This means that the light which was supposed to be in north will find itself with the light which is already there in south. So total light in south direction will increase. But the sum total remains the same.
2007-01-03 22:04:29 · answer #3 · answered by ashutosh115 1 · 0⤊ 0⤋
No. If it did, you could surround the candle with a completely spherical mirror, put the candle out so more & more light would be created by the reflections alone, with no further input of energy. Impossible.
If it was possible you could make a small hole in the sphere & have an everlasting torch, no more crabby batteries!
2007-01-02 17:33:48 · answer #4 · answered by gimbert 3 · 0⤊ 0⤋
No. The amount of light is the same, although the reflection makes it appear more - light bounces off the mirror better than off the wall.
2007-01-02 12:28:17 · answer #5 · answered by Anonymous · 0⤊ 0⤋
No. The mirror would only intercept a portion of the existing light and redirect it somewhere else.
2007-01-02 12:29:47 · answer #6 · answered by Mez 6 · 0⤊ 0⤋
Good question.
You can't actually see light, you only see what light 'bumps' into so in effect the light would bump into the mirror giving the impression of more light, it's not more light you have, just putting it to better use.
2007-01-02 12:29:48 · answer #7 · answered by India 55 5 · 0⤊ 1⤋
No,
And especially NO to "Tink"
A mirror is a "passive" device and therefore cannot add energy to the electromagnetic field.
2007-01-02 17:32:47 · answer #8 · answered by amused_from_afar 4 · 0⤊ 0⤋
The mirror would reflect it out to another area but will not make more.
2007-01-02 12:25:28 · answer #9 · answered by science teacher 7 · 1⤊ 0⤋
If by "light" you mean electromagnetic energy, then no. You can't create energy from nothing. Remember that little law of physics called "conservation of energy"?
2007-01-02 12:26:37 · answer #10 · answered by Dumb 1 · 0⤊ 0⤋