- #1
MACHO-WIMP
- 43
- 0
Hello,
So my dad and I took apart our old TV that had a Fresnel lens inside. Unfortunately there is a crack near the edge due to a billiard ball accidentally being dropped on it. I was wondering how much this crack would affect the lens' ability to focus the sunlight into a point. When we tested this, it didn't work as well as it did in the video, and had trouble burning dead leaves but we think that since it is winter here in the Northern Hemisphere that might have something to do with it. Any comments or advice would be very helpful. Thanks!
PS: we were inspired by this video:
So my dad and I took apart our old TV that had a Fresnel lens inside. Unfortunately there is a crack near the edge due to a billiard ball accidentally being dropped on it. I was wondering how much this crack would affect the lens' ability to focus the sunlight into a point. When we tested this, it didn't work as well as it did in the video, and had trouble burning dead leaves but we think that since it is winter here in the Northern Hemisphere that might have something to do with it. Any comments or advice would be very helpful. Thanks!
PS: we were inspired by this video:
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