Question

when we put our finger in front a a lit flashlight, light appears to pass through our finger when seen on a wall,how?

Answer 1

diffraction phenomenon

Step-by-step explanation:

When you place your finger in front of a flash, you have a diffraction phenomenon whereby the light fills a part of the space with the first maximum diffraction.

In this case the phenomenon of geometric optics cannot explain the process of bending the beam around an object.