The sharpness of the boundary of the shadow of an object is determined by the
A
intensity of light striking the object
B
rays of light passing through the object
C
nature of the object
D
opacity of the object
Verified Correct Answer: A.
Physical Principles & Numerical Solution
The characteristics of a shadow are dependent on the intensity of the light source. A hard light will produce a shadow with a sharp edge, a soft light will produce a shadow with a more blurry edge.
Source: Myschool Past Questions Archive (Record #13240)