Question

which example best illustrates that light behaves like particles?
light bends as it strikes a window.
light bounces off a white cement sidewalk.
light travels in space at a speed of about 3.0 x 10^8 m/s.
light increases in speed as it moves through matter.

Explanation:

The photoelectric - effect and light reflection can be explained by the particle nature of light. When light bounces off a surface like a white cement sidewalk, it is similar to particles hitting a surface and bouncing back. Light bending (refraction) is better explained by the wave - nature of light. The speed of light in space and its change in matter are related to the properties of the medium and the wave - particle duality but are not the best examples of the particle nature.

Answer:

Light bounces off a white cement sidewalk.