An astronomer observes redshift in the light from a distant galaxy.
Which statement about redshift is correct?
1 )
It is the decrease in the observed wavelength of red light emitted from receding galaxies.
2 )
It is evidence that the Universe is contracting and supports the Big Bang Theory.
It is evidence that the Universe is expanding and supports the Big Bang Theory.
4 )
Redshift is when light from receding galaxies appears blue.
تحلیل ویدئویی تست
تحلیل ویدئویی برای این تست ثبت نشده است!
پرسش و پاسخ های مشابه
سوال کنید یا به سوالات دیگران پاسخ دهید ...