Physics of Astronomy Spring 2006 Astronomy & Astrophysics Electromagnetism Seminar: Cosmology & Journals Your research Today: short course on LIGHT.

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Presentation transcript:

Physics of Astronomy Spring 2006 Astronomy & Astrophysics Electromagnetism Seminar: Cosmology & Journals Your research Today: short course on LIGHT

When shall we have weekly research reports? Mondays after HW session?

Seminar

Electromagnetism Giancoli = primary source New! Workshop Physics Module 4 by Laws (Dickinson) on reserve in Library Copy or order Workshop Physics  Light (today)  Potentials (next week)  Circuits through Maxwell’s equations □ Look at SYLLABUS together…

Light Ch.33 Reflection & Refraction Ch.34 Lenses & optical instruments Ch.35 Interference Ch.36 Diffraction & Polarization Hitting the high points….

Ch.33 Reflection

Images formed in mirrors

Refraction: v = c/n; n 1 sin  1 = n 2 sin  2 Q.13

Refraction

Total internal reflection

Ch.34 Lenses & optical instruments

Object far from converging lens forms real image near focal point. Object close to converging lens forms virtual image.

Combinations of lenses (1) Find location of Image 1 → (2) Let this be Object 2 → Find Image 2

Simple camera and human eye

Corrective lenses

Magnifying glass

Telescope

Ch.35 Interference

Huyghen’s principle Every point on a wave front can be considered as a source of tiny wavelets that spread our in the forward direction at the speed of the wave itself.

Huyghens explains refraction

Interference – Young’s double-slit experiment □ First, PREDICT PATTERNS if light is PARTICLES or WAVES

Interference – theoretical explanation

Interference bright spots

Ch.36 Diffraction & Polarization

Diffraction through a single slit Diffraction DARK spots at

Diffraction through a double slit

Diffraction grating

Resolution limits

Polarization

Polarization by reflection