Mert Avsever

Hello, First I'd like to say that I'm a newbie on this cool site and it's my first post. We're taught that light has a great impact on certain vitamins and cause them to be destroyed. I know the mechanism of how heat destroys a vitamin, but light sounds different. Well, can someone explain me how light destroys a vitamin? What happens when a vitamin is exposed to light? What reactions? Thank you in advance.