Telescopes (AQA A-Level Physics): Flashcards
📚Flashcards
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Practise the cards
10 cards from this deck
Two main ways atmosphere limits ground telescopes
Two main ways atmosphere limits ground telescopes
Absorbs and distorts incoming light
Cause of atmospheric turbulence
Cause of atmospheric turbulence
Convection currents in the atmosphere
Definition of astronomical seeing
Definition of astronomical seeing
Effect of atmospheric turbulence on image quality
What atmospheric opacity measures
What atmospheric opacity measures
How much EM radiation atmosphere absorbs vs wavelength
Wavelengths strongly absorbed by upper atmosphere
Wavelengths strongly absorbed by upper atmosphere
Gamma rays and X-rays
Why build telescopes at high altitude
Why build telescopes at high altitude
Above most dense, turbulent atmosphere layers
Why build telescopes in dry locations
Why build telescopes in dry locations
Reduces water vapour absorption and distortion
Main advantage of space-based telescopes
Main advantage of space-based telescopes
Avoid all atmospheric absorption, scattering, turbulence
What water vapour significantly absorbs
What water vapour significantly absorbs
Infrared radiation
Cause of stars appearing to twinkle
Cause of stars appearing to twinkle
Atmospheric turbulence