Which regions of the light radiations of the visible ultraviolet lying between – wavelength are chiefly concerned in bringing about photochemical reactions?

Which regions of the light radiations of the visible ultraviolet lyin

1.	Which regions of the light radiations of the visible ultraviolet lying between – wavelength are chiefly concerned in bringing about photochemical reactions?
A.	1000 Å and 2000 Å
B.	1500 Å and 1000 Å
C.	8000 Å and 2000 Å
D.	19000 Å and 12,000 Å
Answer» D. 19000 Å and 12,000 Å

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Which regions of the light radiations of the visible ultraviolet lying between – wavelength are chiefly concerned in bringing about photochemical reactions?

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