Microwave

Definition

Microwave radiation is a type of electromagnetic radiation with wavelengths ranging from one millimeter to one meter. It falls between infrared and radio waves on the electromagnetic spectrum.

5 Must Know Facts For Your Next Test

1. Microwave wavelengths range from 1mm to 1m, making them longer than infrared but shorter than radio waves.
2. They are commonly used in various technologies, including radar, satellite communications, and microwave ovens.
3. In astronomy, microwaves help detect Cosmic Microwave Background Radiation, providing evidence for the Big Bang theory.
4. Microwaves can penetrate through clouds, dust, and atmospheric gases, making them useful for astronomical observations where optical telescopes fall short.
5. The Planck Satellite uses microwave measurements to map variations in the Cosmic Microwave Background (CMB) across the sky.

Review Questions

• What is the wavelength range of microwaves?
• How do microwaves contribute to our understanding of the Big Bang theory?
• Why are microwaves particularly useful in astronomical observations?

Related terms

Electromagnetic Spectrum:

The complete range of electromagnetic waves arranged by increasing frequency or decreasing wavelength.

Cosmic Microwave Background (CMB): Weak radiation filling the universe that is a remnant from an early stage following the Big Bang.

Planck Satellite:

A space observatory operated by ESA that mapped fluctuations in the CMB with high precision.