Wavelength in a medium

Definition

Wavelength in a medium is the distance between successive crests or troughs of a wave as it propagates through that medium. It varies depending on the properties of the medium and the frequency of the wave.

5 Must Know Facts For Your Next Test

1. Wavelength in a medium is inversely proportional to the refractive index of that medium.
2. The wavelength of light decreases when it enters a denser medium from a less dense medium.
3. Wavelength can be calculated using the formula $\lambda = \frac{v}{f}$, where $\lambda$ is the wavelength, $v$ is the speed of light in the medium, and $f$ is the frequency.
4. In interference patterns, constructive and destructive interference are determined by differences in path lengths that correspond to integer multiples or half-integer multiples of wavelengths.
5. When light passes from one medium to another, its speed and wavelength change, but its frequency remains constant.

Review Questions

• How does the wavelength of light change when it moves from air into water?
• What is the relationship between wavelength and refractive index in a given medium?
• Explain how wavelength affects interference patterns in wave optics.

Related terms

Frequency: The number of oscillations or cycles per unit time, usually measured in Hertz (Hz).

Refractive Index: A measure of how much a ray of light bends when it enters that material.

Interference: The phenomenon where two waves superpose to form a resultant wave of greater, lower, or same amplitude.