Question

The approximate size of a galaxy can be measured by using the doppler effect. true or false.

Answer 1

Doppler effect just helps us in measuring the deviation of sound when observer or source of sound is in motion. Same thing can be observe in case of electromagnetic radiations but Irregular galaxies are different from elliptical and spiral galaxies because the contain very few stars. Just 'cause of that deviations, we can't use Doppler effect in measuring the size of galaxy

In short, Your Answer would be "False"

Hope this helps!

Answer 2

Answer: The correct answer is False.

Step-by-step explanation:

Scientists use the Doppler effect to understand the universe by determining the motion of the object.

Doppler effect: It is the phenomenon in which there is relative motion between the source and listener or source or observer.

Red shift and blue shift can be explained by using the concept of Doppler effect.

From red shift and blue shift, one can conclude that galaxies or stars are moving towards us or going away from us.

The light is shifted to longer wavelength which is red in the case of red shift. The light is shifted to shorter wavelength which is blue in the case of blue shift.

Therefore, "the approximate size of a galaxy can be measured by using the Doppler effect", the given statement is false.