Chapter 6 Optical telescopes

basic principals

refraction: Snell's law

reflection:the law of reflection

How do we collect lights by using the two principals?

types

evaluate the quality

refractors/reflectors

singlets/doublets/triplets

how large is the image?

focal length

image scale

focal ratio

how bright is the image?

surface brightness

image brightness

how good is the image?

diffraction

Airy disk

Rayleigh criterion

six kind of aberrations

mount:how do we control the telescope?

How do we "see" the stars after collecting the light?

eyepieces

calculate the best diameter

other visual accessories

Fov:how wide we can see?