optics - Is it possible to make a source of light such that it only emits one ray of light?

I am just a high school student trying to self study, so please excuse me if you find the question silly.

I don't really need to explain my question.I am just asking if we can make a source of light such that it only emits one ray and if our eye is not in the middle of this ray we can't see the source of light.