Question

The wavelengths λv, λy and λr corresponding to violet, yellow and red lights are respectively. *

1 point

λv<λy<λr

λy<λv<λr

λv>λy>λr

λy<λr<λv

​

Answer 1

Explanation:

(b) Is correct answer.

tq

Answer 2

The wavelengths λv, λy, and λr corresponding to violet, yellow and red lights are respectively λv<λy<λr.

• The wavelength is a characteristic feature of a wave. It is the distance between successive crests or troughs of the wave.
• If the energy carried by an electromagnetic wave is E then, E = hc/λ.
• Here h and c are Planck's constant and the velocity of light in vacuum and λ is the wavelength of the EMW.
• The energies of the light waves of the visible spectrum follow the order Violet > Indigo > Blue > Green > Yellow > Orange > Red.
• Since energy is inversely proportional to wavelength,

      ⇒ The order of wavelength is:

      Violet < Indigo < Blue < Green < Yellow < Orange < Red