Question

question 2
q2. \blue shift\ or
ed shift\ represents ________.
how an object speeding towards us or speeding away from us.
how an object speeding away from us or speeding towards us
how an object is far away from us or near from us
if an object appears blue or red in color.
none of the above
question 3

Explanation:

Red - shift occurs when an object is moving away from an observer (the wavelength of light is stretched, making it shift towards the red end of the spectrum). Blue - shift occurs when an object is moving towards an observer (the wavelength of light is compressed, making it shift towards the blue end of the spectrum). It is about the motion (speed and direction) of the object relative to the observer, not just about the color appearance (as color can be affected by many other factors like the object's own properties) or distance (distance alone doesn't cause the shift, it's the motion).

Answer:

How an object speeding towards us or speeding away from us.