Acosmological redshift occurs because light waves coming from stars and galaxies become bluer as they travel away from us. true false

When stars are moving away (red shift) the wavelength increases and thus the object looks more reddish (Because red color has longer wavelengths). As opposed to when the star is moving closer the wavelength contracts (blue shift) and the object appears slightly blue. So, the statement is False.

This is a material, medium of substance that does not conduct electrical current. Examples: Eraser, plastic and probably glass.