Question

Select all that apply.

The spectrum of Star Y is compared to a reference hydrogen spectrum. What can be concluded about Star Y?
https://clackamasweb.owschools.com/media/g_ipc_2014/11/doppler_shift_star_y.jpg

Star Y is showing radial motion
Star Y is moving toward the Earth
Star Y is moving away from the Earth
Star Y is showing transverse motion

Answer 1

There can be more then one

Answer 2

@alcantaras

Answer 3

is it a red shift, or blue shift?

Answer 4

blue?

Answer 5

right, the start being measured appear more blue than it really is.

are blue waves longer than, or shorter than red ones?

Answer 6

the waves will appear: longer, when the star is moving away,
or shorter, when moving toward the observer

Answer 7

the blue waves are longer right?

Answer 8

no!, red waves are longer

Answer 9

sorry, I just suck at this:(

Answer 10

so star y is moving away right?

Answer 11

if it were moving away, the waves would appear longer, and redder.

But. the waves appears shorter and bluer....

Answer 12

oh ok.

Answer 13

are they radial or transverse?

Answer 14

oh so its transverse?

Answer 15

Radial motion would mean, the star is moving around the observer, which would imply a constant distance

Answer 16

@UnkleRhaukus u are right

Answer 17

I think Traverses motion would mean, moving up and down relative to the observer, which again would maintain roughly the same distance between the two

Answer 18

so its only the 2nd thats it?

Answer 19

Yeap, i think that is right.

Answer 20

thank you:))

Answer 21

Wait. i think i've got my definition of Radial Motion incorrect,

Radial motion would mean, the star is directly toward or away from the observer

Answer 22

so you should include this option in your answer

Answer 23

@hhelpplzzzz

Answer 24

ok thank you