Wavelength

Definition

Wavelength is the distance between successive peaks or troughs of a wave, usually measured in meters. It is a fundamental property of all types of waves, including light waves studied in astronomy.

5 Must Know Facts For Your Next Test

1. Wavelength determines the color of visible light; shorter wavelengths correspond to blue light and longer wavelengths to red light.
2. It is inversely proportional to frequency, meaning that higher frequency waves have shorter wavelengths and vice versa.
3. In the electromagnetic spectrum, different types of radiation (e.g., radio waves, microwaves, infrared) are categorized by their wavelength ranges.
4. Astronomers use wavelengths to determine various properties of celestial objects, such as their composition and temperature.
5. The concept of wavelength is essential for understanding phenomena like Doppler shifts, which indicate motion relative to the observer.

Review Questions

• How does wavelength relate to the color of visible light?
• Explain the relationship between wavelength and frequency.
• Why is understanding wavelength important for astronomers?

Related terms

Frequency: one sentence definition

Electromagnetic Spectrum: one sentence definition

Doppler Shift: one sentence definition