Answered

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Glass lenses are practically opaque to an emission source with the wavelength shorter than 400nm. (True or False)

Sagot :

Answer:

the statement is TRUE

Explanation:

Most lenses are made of glass that has a strong absorption below 400 nm,

Only special evaporation lenses are made of quartz and fused silica which has a high absorption below 200 nm.

therefore the statement is TRUE

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