Does a black whole affect light?
Inside a black hold, there is no light. Anything that enters a black whole can't escape.
Even solar flares (which give off certain amounts of radiation) can't escape.
A black hole can take stars in and you'll never know they were sucked in. That is because a black hole acts as a vacuum.
Radiation and matter cannot escape a black hole. That means since light can be forms of radiation (such as infrared rays, x-rays, ultraviolet rays, gamma rays and etc) they can't escape.
To be short, anything that get's trapped in the radius of a black hole, will be pulled directly inside in a matter of seconds. The theory of relativity, which was created by Albert Einstein explains more about how how a black hole acts.
Wikipedia isn't the greatest source but I think it will help you a little bit. Here's the link: