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

The correct answer is False.

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.

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation: