That is correct, redshift is an expansion in wavelength (I.e. it’s heading toward the red end of the visible spectrum and even into infrared and beyond) and thus decreasing frequency. As what causes redshift, yes age can, due to the universe’s natural space-time expansion, this causes radiation’s wavelength to expand.
toasterbread75 t1_iry78rx wrote
Reply to comment by Guardian1030 in My mom's 34 year old microwave from 1988 by jimbodeako
That is correct, redshift is an expansion in wavelength (I.e. it’s heading toward the red end of the visible spectrum and even into infrared and beyond) and thus decreasing frequency. As what causes redshift, yes age can, due to the universe’s natural space-time expansion, this causes radiation’s wavelength to expand.
Read Hubble’s Law for more info on this