Wavelength

Definition

Wavelength is the distance between successive peaks or troughs in a wave. It is often used to describe characteristics of light and other electromagnetic waves.

5 Must Know Facts For Your Next Test

1. Wavelength is commonly measured in nanometers (nm) when discussing light.
2. Shorter wavelengths correspond to higher energy and higher frequency light.
3. Visible light ranges from approximately 400 nm (violet) to 700 nm (red).
4. Ultraviolet and infrared lights have wavelengths shorter and longer, respectively, than visible light.
5. In microscopy, different wavelengths can be used to enhance contrast and resolution.

Review Questions

• How is wavelength related to the energy of light?
• What are the typical units used to measure wavelength in the context of light?
• Why is understanding wavelength important in microscopy?

Related terms

Frequency: The number of waves that pass a given point per second.

Amplitude: The height of a wave peak or depth of a trough from the midline.

Electromagnetic Spectrum: The range of all types of electromagnetic radiation including visible light, ultraviolet, and infrared.