What is the light spot in these picture ?

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can anyone tell me please what is the light spot in these picture ?
j5h4jn.jpg
 
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What picture(s)?
 
i'm sory
i write wrong url for the picture
 
Looks like a spot of light. Impossible to say any more.
 
these spot from what ?
 
jhon said:
can anyone tell me please what is the light spot in these picture ?
It is hard for us to say just from looking at this photo. Do you yourself have access to this lab? Using a small slip of paper or business card, position the paper so that it casts a shadow or blocks the spot of light. Move the paper farther away from the spot's location, keeping the spot blocked. Eventually the paper should hit whatever the source of light is.
 
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give more information about the experiment you are doing, may be laser induced plasma!
 

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