AST201H5 Lecture Notes - Lecture 3: Radiography, Angular Distance, Blueshift
Document Summary
Model of the atom as a miniature solar system fails because an accelerating charge (e-) loses energy, spirals into nucleus. Second atomic model: only certain e- orbits are allowed. Absorption of certain wavelength=energy to raise electron. Emission of certain wavelengths= energy released when electron returns to. Each element has its own number of e- -> own unique pattern a lower level. Molecules and ions each have different patterns. Doppler effect = spectral pattern shifted by radial motion: motion apart -> redshift, motion toward -. blueshift. Telescope = larger pupils to gather more light from faint astronomical objects. A telescope gives us a bigger pupil. Gain = area of telescope/area of pupil = (tel diameter/pupil diameter)^2. Largest telescope diameter = 10. 4m or 10400 mm. Telescopes give sharper images - reveal finer detail ( this is not magnification) Recall (ch 2) - we observe angular sizes. Angle = wavelength of light/diameter of telescope.
