chapter 13 astrophysics Flashcards
(13 cards)
what does a converging lense look like?
what’s a real image?
a real image is captured on a screen and is when it passes through a lense and the light rays are actually there hence real.
whats a virtual image?
a virtual image is formed when light rays appear to have come through but the light rays arent were they appear to be
what does a refracting telescope look like?
whats magnification equation?
M = fo/fe = Oi/Oo
what is apparent magnitude?
apparent magnitude is how bright things look like from earth.
what is an arcsecond?
An arcsecond is equal to 1/3600 of a degree or 1/60 of an arcminute.
the equation
m - M = 5 log ( d / 10)
what do the symbols stand for?
m - M = 5 log ( d / 10)
M= absolute magnitude m= apparent magnitude d= distance in parsecs
what’s absolute magnitude?
absolute magnitude is the magnitude it wa 10 parsecs away from earth
hubbles law is found on the data sheet. what do the symbols stand for?
𝑣 = 𝐻d
Hubble’s law 𝑣 = 𝐻d
v= rescessional velocity (km s) H= hubbles constant (km s Mpc^-1) d= distance in Mpc
what is the age of the universe equation?
t= 1/ ho
t is in seconds
what is the doppler effect?
the doppler effect is how motion affects wavelength
what is the doppler effect?
the doppler effect is how motion affects wavelength
