Why the Cloak Might Not Protect You:
* Petrificus Totalus: The Petrificus Totalus spell immobilizes a person, but it doesn't specify how it works. It could target magical energy, physical movement, or even the nervous system. An invisible person might still be vulnerable.
* Killing Curse: The Killing Curse is a powerful death spell. It's not clear if the cloak could shield from magical energy, especially something as potent as Avada Kedavra.
Why the Cloak Might Protect You:
* Invisibility: The cloak makes the wearer completely invisible. If a spell is aimed at a target, and that target isn't visible, the spell might miss.
* Magical Resistance: The cloak is a powerful artifact, perhaps with some magical resistance built in. It might be able to deflect or absorb some spells.
The Verdict:
There's no definitive answer. J.K. Rowling never explicitly stated what would happen to someone under the invisibility cloak when hit by a spell. It's a fun thought experiment, and you could make a case for either outcome.
Ultimately, the best answer is: It depends on the specific spell and how the cloak works.
Let's add a bit of speculation: If the cloak only makes you invisible but doesn't offer any magical resistance, it might be vulnerable to powerful spells. But if the cloak itself has some inherent protection, it might be able to shield the wearer from lesser spells.
What do you think? Would the cloak protect you?