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can a normal lamp mimic the sun for this ? Answered

i want to make a plate/bowl with mirors that reflect the light to a certain point.if i put the ceiling lamp on and use that light to aim all the mirrors to one point. wil it work in the sun too ?

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mpilchfamilyBest Answer (author)2012-06-05

Indoor lighting isn't intense enough to be a good means of focusing an aperture intended to focus sun light to a specific point. Save your focusing for when you get it into the sun.

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Kiteman (author)mpilchfamily2012-06-05

+1

Plus, the difference in distance (10 feet vs 93,000,000 miles) means that the point at which the light is focused will change when you change light sources.

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rabarbarbaar! (author)Kiteman2012-06-06

tnx for your answers.

here is my problem now:
i want enough mirrors (small ones) focused on one point so i can create fire,

but the distance between the sun and earth changes constantly, so technically i would focus them and only 2 times a year it will be focused ?

or is the distance of the sun too little to make a difference ?

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Kiteman (author)rabarbarbaar!2012-06-06

The differences in the Earth-Sun distance are tiny compared to the total distance - the Sun is, effectively, a light-source at infinite distance.

(The shape you're after with your mirrors is a parabola.)

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rabarbarbaar! (author)Kiteman2012-06-06

tnx so i just have to be patient.

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