I am writing a fic in which Hermione is coming back to England after fetching her parents from Australia. She is using her beaded bag and is stopped by airport security while her carry-on luggage is being X-rayed. The stress of finding her parents led her to forget that the bag may look a little odd to airport security because of the Non-detectable extension charm.
How do you think the bag would look under X-ray? And what would the implications be for Hermione?