A question. Is there a way for anyone to know their laptop is taking photos of them? Be it a Mac or a PC. And is there a way to know if my computer is transm

A question. Is there a way for anyone to know their laptop is taking photos of them? Be it a Mac or a PC. And is there a way to know if my computer is transmitting those images. I wonder whether such apps can be installed by malicious individuals to spy on people.