Question

during an experiment, a student observes that light passing through a fine mesh creates a series of bright and dark spots on a wall. which model of light correctly explains this observation, and why?
the particle model, because light scatters through the mesh
the particle model, because light reflects through the mesh
the energy model, because light refracts through the mesh
the wave model, because light diffracts through the mesh

Explanation:

• The particle model of light does not explain the formation of bright and dark spots (interference or diffraction patterns). Scattering, reflection, and refraction in the particle model do not lead to such patterns.
• The wave model of light, on the other hand, can explain the formation of bright and dark spots. Diffraction (a wave - related phenomenon) occurs when light passes through a fine mesh. When light waves pass through the small openings in the mesh, they spread out (diffract). These diffracted waves can interfere with each other. Constructive interference (waves in phase) creates bright spots and destructive interference (waves out of phase) creates dark spots.

Answer:

The wave model, because light diffracts through the mesh.