Light is modified by filters to achieve certain purposes. The blue fil – McqOptions

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1.	Light is modified by filters to achieve certain purposes. The blue filter centred at 457 nm for paper brightness is well known __________ utilized to remove the I.R. energy from blackbody radiation sources.
A.	tHeat filters
B.	tGrey body radiation
C.	tEM radiation
D.	tUV filters
Answer» B. tGrey body radiation

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