Astro 1050     Mon. Feb. 7, 2005

Chapter 5: Astronomical Tools

Radiation: Two different kinds

Properties of Light

Light is an electromagnetic wave

The Electromagnetic Spectrum

Relationship between Energy and Wavelength of Light

Why is energy per photon so important?

Numerical Relationship between
 wavelength and photon energy

Optical Telescopes and Cameras

Refracting vs. Reflecting Telescopes

Why do astronomers need large telescopes?

Kinds of measurements made with telescopes

Dark Side of the Moon

Dark Side of the Moon

Observing over the entire electromagnetic spectrum

Bad “seeing”/Good “seeing”

Active/Adaptive Optics

Hubble Space Telescope (HST)

Chandra X-ray Observatory

Radio Telescopes

Infrared Telescopes

Infrared Telescopes

The Electromagnetic Spectrum