Quiz 2: ASTR 101 Telescopes & The Sun Flashcards
What is Refraction?
When light enters a new medium, bends/changes direction (Huygen’s principe)
What is Reflection?
Bounced angle = incident angle
What is a Challenge with Refracting Telescopes?
Chromatic Aberration: Different colors bend by different amounts.
What is a Galilean Telescope?
A refracting Telescope
What is a Newtonian Telescope
A reflecting telescope
What is the inverse square law for light?
Closer = Brighter
Light decreases as 1/r^2
What is false-color Imaging?
When a color is assigned to a wavelength of light that we cannot typically see.
What is spectroscopy?
Study between how matter correlates to electromagnetic radiation.
What is Photometry?
Used to measure the flux of light given off by astronomical bodies
What is light gathering power?
Basically the aperture of a telescope, more light gathered, more information
What is the resolving power?
Basically the ability to seperate two very close objects
What are some techniques to gather more light?
CCD Camera
use filters to block out colors we don’t want
longer exposure times
have a larger area for the telescope
What happens when we increase the telescope size?
We can take in more light
guide star in adaptive optics
An artificial star produced by a laser to help correct for the atmospheric blurring or twinkling effect of light passing through the atmosphere.
