Question

A circular disc and a sphere of the same diameter are floating above the ground. The circular disc is parallel to the ground. Which option shows the CORRECT set of shadows on the ground when seen from the top? 

• A. A
• B. B
• C. C
• D. D

Hint:

When dealing with shadows, consider the angle of light. For flat objects like discs, shadows remain circular, while spherical objects cast elliptical shadows if the light is angled.

Answer 1

The Correct Option is A

Step 1: The shadow of a circular disc, when viewed from the top, will always be a circle because the disc is parallel to the ground.
Step 2: The shadow of the sphere will be elliptical due to the 45° angle of the sunlight. Since the sunlight is not directly above, the sphere’s circular shadow becomes elongated.
Step 3: Option (A) is the correct representation of a circular shadow for the disc and an elliptical shadow for the sphere.