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OpenStudy (anonymous):
Hi! what element can decrease the ray`s sun?
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OpenStudy (unklerhaukus):
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OpenStudy (anonymous):
thank you for your help.now i can another question, what element can decrease the rays`s light bulb? if you are answer to my question , i will very thankful.
OpenStudy (unklerhaukus):
what wavelengths are we talking about ?
OpenStudy (anonymous):
for example halogen bulb...
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