PhysicsRankPREVIEWTry a problem

THE PRACTICE STUDIO

Go slowly. Ask why. Make it yours.

PRACTICE · MEMBERSIntermediate · Single correct

PRACTICE / Electromagnetic spectrum

Changing medium does not rename the source frequency

An electromagnetic wave has vacuum wavelength 600 nm and enters a transparent material with refractive index 1.50 at that frequency. Use c = 3.0×10⁸ m/s.

What is its wavelength inside the material?

Organize the givens & assumptions
  • Vacuum wavelength = 600 nm
  • n = 1.50
  • Stationary interface

Linear transparent medium at the stated frequency, no frequency conversion; phase refractive index is supplied. The source frequency remains fixed at a stationary interface.

  1. A400 nm400\ \mathrm{nm}
  2. B600 nm600\ \mathrm{nm}
  3. C900 nm900\ \mathrm{nm}
  4. D300 nm300\ \mathrm{nm}

Try it on paper first. Free sample problems in every collection include the complete reasoning: find one in this collection →