If I block someone on Facebook, will they be able to see photos that I upload which our mutual friends are in?

No, they won't be able to see anything you upload.

Once you block someone on Facebook, this person can no longer be your friend, interact, or communicate with you in any way, except within applications and games you both use. Since blocking is mutual, when you block someone, you and this person won't be able to:

- See each other's profiles
- Find each other through the Facebook search box
- See each other in the list of friends of your mutual friends

No they won't.

If photo is uploaded by you, anyone you block in facebook CAN NOT see your photos. unless they use other facebook account that you had not blocked, and they secretly see your photo on same link same profile.

Regarding "Mutual friends" part:
If the photo is uploaded by your facebook, anyone you blocked can NOT see that photo

but if the photo is uploaded by that MUTUAL FRIEND. then yes. that blocked dude can see your photo THAT MUTUAL FD uploaded. because yuor Mutual friend had not blocked that person. only you block them. unless that blocked dude, block that friend. or that friend also block that blocked person.

if you block, that friend did not block. right? if that friend (mutual fd) upload any photo you are in. then yes your block fb people can still see that photo YOU ARE IN. but if you upload that photo then no they can no longer see any photo your FB profile uploads

NO. unless the photo is uploaded by "that mutual friend"

yes

Yes if you have mutual friends.