Wavelength of light is: (A) 400-700 nm, (B) 500-800 nm, (C) 700-900 nm, (D) 300-600 nm
Answer is A. Ans: a (400-700nm) Ref: Vasudevan 4th ed p. 479Wavelength of visible light is 400-700nm.Violet- 420 nmBlue- 470 nmGreen- 520 nmYellow- 580 nmRed- 680 nm