chapter 13 astrophysics

Question 1

what does a converging lense look like?

Answer 1

Question 2

what’s a real image?

Answer 2

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.

Question 3

whats a virtual image?

Answer 3

a virtual image is formed when light rays appear to have come through but the light rays arent were they appear to be

Question 4

what does a refracting telescope look like?

Answer 4

Question 5

whats magnification equation?

Answer 5

M = fo/fe = Oi/Oo

Question 6

what is apparent magnitude?

Answer 6

apparent magnitude is how bright things look like from earth.

Question 7

what is an arcsecond?

Answer 7

An arcsecond is equal to 1/3600 of a degree or 1/60 of an arcminute.

Question 8

the equation

m - M = 5 log ( d / 10)

what do the symbols stand for?

Answer 8

m - M = 5 log ( d / 10)

M= absolute magnitude 
m= apparent magnitude 
d= distance in parsecs

Question 9

what’s absolute magnitude?

Answer 9

absolute magnitude is the magnitude it wa 10 parsecs away from earth

Question 10

hubbles law is found on the data sheet. what do the symbols stand for?
𝑣 = 𝐻d

Answer 10

Hubble’s law 𝑣 = 𝐻d

v= rescessional velocity (km s)
H= hubbles constant (km s Mpc^-1) 
d= distance in Mpc

Question 11

what is the age of the universe equation?

Answer 11

t= 1/ ho

t is in seconds

Question 12

what is the doppler effect?

Answer 12

the doppler effect is how motion affects wavelength

Question 13

what is the doppler effect?

Answer 13

the doppler effect is how motion affects wavelength