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Melted glass or plastic fragments on the filament.
If someone ploughs into the back of you and then claims your brakelights weren't working, this can be confirmed or verified in a matter of minutes by an accident investigation officer. |
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bostonianinmo
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If the bulb is powered on at impact, the filament will stretch before breaking. If it is not on, or was turned off within a couple of seconds prior to impact, it will not stretch before breaking. |
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MARTIN S
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Depends on what you mean by blown ? In a crash you will always find that the bulb will be smashed and th only way you could find out if the buld had blown befor the crash is due to heat resedue within the light bulb it also depends if the light was on at the tiome of the crash. |
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Bardic
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Bulbs give off light because the filament inside is white-hot when powered. A hot filament willl stretch, a cold one will just break. Close examination of the filament will show whether it stretched or not, and therefore whether it was working or not. |
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The original Peter G
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If the bulb was hot at time of impact and the glass is broken then the filament will have an oxide coating. If the glass is intact then you can look at the broken ends. If it had blown when hot the ends will be melted. If cold break then a rough end. |
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Martin S
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It's amazing but they do something to do with the colour of the bulb inside. |
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futuretopgun101
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Scorch marks on the bulb componants including the shattered bulb. |
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BILL D
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Hard to tell, maybee, nasa may have figured out how to do this, im not sure. |
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Ron S
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Yes, the type of fracture of the element will be different and the internal gasses of the bulb are contaminated if it electrically blows. (combustion traces) |
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cleocat
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Probably to do with the colour of the filament as it turn black when a bulbs blows on it's own. |
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jeanimus
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If it blows before, the filament will be burned out, but it wont after |
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trashy
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CSI boy! CSI! you cant poop without the csi people knowing what time you did it these days boy! |
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