A: When you go to the convenience store to pick up your order, you need to show the receipt. B:...
A: When you go to the convenience store to pick up your order, you need to show the receipt. B: The actual receipt? Or can I show them an image of the receipt on my phone? A: The actual receipt.
A: Light is made of electromagnetic waves from the wave perspective and photons from the particle perspective. It is definitely a physical object. B: But you can't touch light. So I'd say light is not a tangible object.
