Question

A star has a spectrum shift exhibiting a blue shift. What can you conclude about the distance from Earth to that star?

The distance is increasing.

The distance is decreasing.

The distance will remain unchanged.

The distance varies with the temperature of the star.

Answer 1

a blue shift means the object is coming towards you. a redshift means the object is moving away from you. does that help? remember it like this, an angry person (red) runs away from you.

Answer 2

Read :: http://www.fullmarks.org/images/stories/studytips/physics-xi-xii.pdf

Answer 3

@DemolisionWolf it'll be B

Answer 4

@dreamer05 yep ^_^

Answer 5

Thank you

Answer 6

ya! (medal please :D)