A student observes that the size and shape of a shadow can change. What two factors primarily influence the size and shape of a shadow?
Options
The color of the object and the brightness of the light source.
The distance between the object and the light source, and the distance between the object and the screen.
The type of light source (natural or artificial) and the material of the screen.
The air temperature and the humidity in the environment.
Explanation
The size and shape of a shadow are primarily determined by two factors: the distance between the opaque object and the light source, and the distance between the object and the screen where the shadow is formed. If the object is closer to the light source, the shadow will be larger. If it is closer to the screen, the shadow will be sharper. Options A, C, and D mention factors that are either irrelevant or have negligible impact on the size and shape of the shadow.