Electromagnetic Spectrum
Wave-Particle Duality
Interferometry
What is Interferometry?
Interferometry is a technique used by scientists and engineers. Tools called interferometers add together 2 or more waves of light. When they do this, the waves of light interact (or interfere) with each other. This can add the waves together, making them brighter. It can also cancel the waves out. Interference only takes place if the waves come from the same object or have the same frequency. We call these types of wave coherent.
FAST Telescope
Jocelyn Bell-Burnell
![Jocelyn Bell-Burnell](/sites/default/files/learn/BellBurnell.jpeg)
Credit: Wikimedia (User: Anrie)
Occupation: Astrophysicist
Year born: 1943
Research Areas: Radio-Astronomy, Pulsars
Fermi Gamma-ray Space Telescope
![](/sites/default/files/astro/fermi_0.png)
Credit: NASA
Spitzer Space Telescope (SST)
![](/sites/default/files/astro/spitzer_0.jpg)
Credit: NASA/JPL-Caltech
Chandra X-Ray Observatory
![Artist's impression of the Chandra x-ray observatory](/sites/default/files/astro/Chandra_artist_illustration_0.jpg)
Credit: NASA/CXC/NGST