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A couple of other comments mentioned the filaments, but the article says nothing about clear bulbs. They are very much in fashion these days, but most incandesc
by braythwayt 6y ago
A couple of other comments mentioned the filaments, but the article says nothing about clear bulbs. They are very much in fashion these days, but most incandescent bulbs are frosted, so it seems to me that if you want to use a laser on the filament, there would need to be some considerations around photons passing through the frosting and reflecting off the filament.
- buran77 6y agoThe bulb doesn't have to be clear, the filament vibration would make the light flicker visibly (for sensitive equipment that is) even if the glass isn't clear. So it may be that the filament is far more susceptible to vibration than the glass on any type of light bulb. As I said, this is my interpretation, the text doesn't make it clear to me.
- steverb 6y agoI don't think it's about observing the filament directly, just that the filament basically being a spring is more susceptible to vibrations which would change the amount of light emitted. I am totally guessing at that, but it seems reasonable.