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.

Light is modified by filters to achieve certain purposes. The blue fi

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.	Heat filters
B.	Grey body radiation
C.	EM radiation
D.	UV filters
Answer» B. Grey body radiation

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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.

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