Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

Monochromatic light of wavelenght 589nm is incident from air on a water surface. What are the wavelenght, frequency and speed of

(a) Reflected light (b) refrated light?



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The speed of light depends on the medium.  The wavelength also depends on the medium in which light waves travel.    But the Frequency depends on the source that generates the light waves.

Wavelength in air = λ = 589 nm.        let the speed of light in air = c = 3 * 10⁸ m/s
         frequency f = c / λ = 5.0933 * 10¹⁴ Hertz

a) reflected light
     it will have the same characteristics as the incident light.  Reason is:  The frequency is always the same. Speed is same as medium is air.  Hence wavelength is also same.

b) refracted light.

   Refractive index μ  of water = 1.33
   speed of light in water = 3 * 10⁸/ 1.33  = 2.255 * 10⁸ m/s
     frequency = f = same = 5.0933 * 10¹⁴ Hertz
     wavelength = λ = 2.255 * 10⁸ / (5.0933 * 10¹⁴) = 442.86 nm

2 5 2
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts