物體吸收光後，按入射角反射還是向四方入面射出?

When light beam is reflected from the surface of an apple, it goes almost in all direction basically because the surface of an apple is not flat. Imagine cutting a slice of apple and put it to study under microscope, the edge(surface) is actually rounded, and in some cases it can be a little bit rough. When drawing a light beam diagram, you can draw some 5 or 10 arrows to illustrate light source, and when they land on to rough/curved surface, they all have different angle to the surface. Although all of those will be reflected perfectly at the same angle out, the reflected light beams are not parallel.

and basically a true light beam can be divided into so many small beams and got reflected in almost all direction, you can see the apple from almost anywhere in front of the spot.

if u change apple to a perfect mirror, that's another story.

光反射時會遵從反射定律,即反射角等於其入射角,是一定的

但apple的表面不是平面,光會向四方八面反射開去,即漫反射,所以你可以係多個位都見到
但都是遵從反射定律的