RedShift and the Universe

Question 1

what does blue shift tell us about the movement of a galaxy

Answer 1

the Galaxy is moving towards ys

Question 2

what does the amount of red shift tell us about a galaxies position and movement

Answer 2

the bigger the red shift the further the Galaxy is away and the faster it is moving

Question 3

other than red shift of galaxies, what evidence is there for the Big Bang

Answer 3

cosmic background microwave radiation

Question 4

it is thought that gamma rays were released in the Big Bang. How has the wavelength of these microwaves changed as the universe has expanded

Answer 4

it has increased to produce what we can see in the universe now, microwaves, hence CMBR

Question 5

name the effect of waves appearing to decrease in wavelength from an observer as wave source moves away from them

Answer 5

the Doppler effect

Question 6

what happens to wavelength of sound when an object releasing sound waves travels away from an observer

Answer 6

it increases. The frequency therefore decreases.

Question 7

what is red shift

Answer 7

the apparent increase in wavelength of light from a galaxy moving away from an observer