Question

When the laser light is projected into the pinhole and disperses, Which light theory is being modeled?

Answer 1

Well, the behaviour is called refraction. I'm not sure what the question means by theory. Perhaps the options are wave and corpuscular/particle?

Answer 2

the options are
Light is a wave
Light is a particle

Answer 3

@broken_symmetry

Answer 4

Sorry, the behaviour is called diffraction, not refraction, my bad.

Anyway, both of these behaviours are either wave-like or particle-like.

Here's a picture, if that helps

Answer 5

Thanks for the explanation!