Astro 1050     Wed. Feb. 4, 2004

Distances to Stars
(Parallax from pages 134-136, goes with lab this week)

Parallax: Really just the small angle formula

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