Question

The visible part of the electromagnetic spectrum consists of radiations having a wavelength in the range of

• A. 400-800 nm
• B. 300-2600 nm
• C. 390-760 nm
• D. 650-760 nm

Answer 1

The correct option is C 390-760 nm

Light is the visible part of electromagnetic radiations. visible light consists of radiations having a wavelength between 390-760 nm (or 3900-7600 $\mathring{A}$ ) It can be resolved into light of different colours - violet (390-430 nm), blue or indigo (430-470 nm), blue-green or blue (470-500 nm), green (500-580 nm), yellow (580-600 nm),orange (600-650 nm), orange-red (650-660 nm) and red (660-760 nm).

So the correct answer is '390-760 nm'.