What is the wavelength of visible spectrum:

A. 1300-3000a

B. 3900-7600a

C. 7800-8000a
D. None of these
What is the wavelength of visible spectrum: | 3900-7600a | CSS, PMS, PPSC, FPSC, KPPSC, SPSC, ISSB and NTS Past Papers | Pakistan's Largest Online Past Papers Database

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