Kaluza's ideas involved the introduction of a fifth dimension and, although he has been criticised for introducing this as a purely mathematical idea, his work is important and was explored by others.
Kaluza ng mga ideya na kasangkot ang pagpapakilala ng isang sukat at ikalima, kahit na siya ay na-criticised para sa mga nagpapakilala na ito bilang isang dalisay matematikal na ideya, ang kanyang trabaho ay mahalaga at noon ay explored ng iba.