What is an orb and energy ribbons?

For myself in particular i only know what an orb is. An Orb is a light that can be seen in life in photographs in films it is a spirit that has passed over and has either come to reassure you or it has come to give you a message. My grandmother recently died and while i was luxing i saw an orb and knowing it was her i tried to just ignore it then she said "excuse me" and i knew she was just letting me know she was ok especially when she said thank you when i moved i could hear her feel her and see her orb. Orbs can be also for when someone on the other side is waiting patiently to help someone living cross over when they know they are ill and are close to passing away like an orb was in all the pictures of my grandma before she died and so we all knew she was close to passing over we figure it was our grandfather.