The term ''hertz'' means "vibrations, transitions, or other events per second." For the definitions of the terms '''watt''' and '''steradian''', see below. Light having the stated frequency is generally perceived as red. | The term ''hertz'' means "vibrations, transitions, or other events per second." For the definitions of the terms '''watt''' and '''steradian''', see below. Light having the stated frequency is generally perceived as red. |