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Need to know and understand

Need to know and understand. Basic physical processes Attenuation of radiation by matter Optical depth Blackbody radiation Wien displacement law l max T = 2.9x10 6 nm.K Stefan-Boltzmann Law L = 4 p R 2 s T 4 Telescopes Basic design Diffraction-limited resolution Q = 1.22l / D

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Need to know and understand

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  1. Need to know and understand • Basic physical processes • Attenuation of radiation by matter • Optical depth • Blackbody radiation • Wien displacement law • lmaxT = 2.9x106nm.K • Stefan-Boltzmann Law • L = 4pR2sT4 • Telescopes • Basic design • Diffraction-limited resolution • Q = 1.22l / D • Seeing, over-coming seeing (AO) • Focal length, plate scale • How CCD detectors work, QE

  2. Need to know and understand • Magnitude system • Origin • Derive m-M=5logd-5 • UBVRIJHK photometric system • Concept of colour • How to estimate T from (B-V) • Concept of bolometric mag • Spectrographs • Diffraction grating & grating eqt • D sin q = ml • Resolving power, angular dispertion, linear dispersion

  3. Need to know and understand • Infra-red • Absorption by dust • The reddening curve • Measuring Av • Colour excess • IR emission by dust • Observing in the IR, difficulties • Ultra-violet • Absorption by gas (interstellar opacity) • Interstellar absorption lines • Curve of growth analysis • Relations for different parts of CoG

  4. Need to know and understand • Radio astronomy • Radio v optical • Resolution • Interferometry, aperture synthesis • Q = l / L • Super-luminal motion • Understand, derive, prove actual motion not faster-than-light • X-ray astronomy • Imaging in x-rays • Basic absorption processes • Basic accretion physics and Eddington luminosity

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