when i block someone on fb does that mean i cant go their page ??

[Aditya]

Yes. Blocking allows you to prevent many interactions with someone on Facebook, but you may still encounter content they’ve shared.
Here’s what you might see:
*.Messages:Your message history with someone you’ve blocked will stay in your inbox. If the blocked person is ever included in a conversation with a group of friends, you’ll be able to see the message. Remember, you can leave a conversationthat you don’t want to be part of, or delete a conversationthat you don’t like.
*.Mutual friend stories:There’s a chance that you'll see stories about the blocked person through mutual friends. For example, if the blocked person tags a mutual friend in a photo, you might see this story on your friend’s timeline.
*.Photos:You might see photos or tags of the blocked person added by other people.
*.Groups:Someone you’ve blocked won’t be able to add you to a group, but you’ll be able to see groups that the blocked person created or is a member of.
*.Events:Someone you’ve blocked won’t be able to invite you to an event, but you’ll be able to see events to which both you and the blocked person are invited.
*.Games and apps:Since games and apps are run by outside developers, the Facebook block won't apply to them. So you could see someone you blocked while you're playing a game (for example, in the game's chat room).