PHYS 1902 Lecture Notes - Lecture 5: Hubble Space Telescope, European Southern Observatory, Chromatic Aberration
15 Feb 2016
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1 lecture telescopes and instruments: read chapter 5, exercises: do all review and discussion and all conceptual self-test ) 1. 1 optical telescopes: telescope is a light bucket capture photons, optical telescopes collect photons in the visible part of the spectrum, long history galileo (early 17th century), primary astronomical instrument for over. 350 years: optical telescopes (lenses), best known by public, thus our starting point, optical telescopes come in two main categories: refractors and re ectors, refractors. Based on the optical principle of refraction. Think of the appearance of a straw bent in a glass of water (see pic. Lens in a refractor gathers and concentrates light acts as many tiny prisms all bending the light to a focus point (see pic. Light slows down in glass the speed of light is faster in air than in glass. The speed bump causes light to bend. Eye piece used to magnify the image created at the focus point.
