Question

Which of the following is correct for the increasing order of wavelengths of colour?

• A. Orange $<$ yellow $<$ red $<$ blue
• B. Red $<$ blue $<$ orange $<$ yellow
• C. Blue $<$ yellow $<$ orange $<$ red
• D. Yellow $<$ blue $<$ orange $<$ red

Answer 1

The correct option is C Blue $<$ yellow $<$ orange $<$ red

The wavelength of visible light (VIBGYOR) lies in this range of 400 nm- 700 nm. Each colour has a specific wavelength and energy. Violet colour has the lowest wavelength $\approx$ 400 nm and the red colour has the highest wavelength of $\approx$ 700 nm.