Can you look at pictures on a locked iPhone?

Can you look at pictures on a locked iPhone?
Someone stole my iPhone, is there ANY possible way For them to look into my pictures and or apps?
Could they plug it into the computer or download something to look into the phone, apes pictures etc.

No there's no way they can. Trust me, my sister tried to download stuff from my iPhone onto her computer, she had my permission but I wasn't home and she needed the password so it wouldn't work. As for the pictures, they can't look at your photos.

Yes very easily i believe. Simply plug the idevice into a windows computer. (I'm not sure about a mac)
Then a screen should popup. Press "Open folder to view files" And then keep clicking till you get to the pictures. There should only be one choice so finding them won't be a problem. There's no way to look at the apps i'm sorry.