Question

Three identical towels of red, blue, and green color are hanging on a clothesline in the sun. What would be the color of shadows of these towels ?

Answer 1

Hint: The sun was directly overhead, and the light would shine straight down into a well. In Alexandria, Eratosthenes conducted his experiments and discovered that there were shadows on the same day and at the same time. The sun shone down on Syene directly, but Alexandria was at an angle.

Complete answer:
A shadow is a dark (real-world) area in which light from a light source is blocked by an opaque object. It takes up the entire three-dimensional volume behind a light-emitting object. A shadow's cross-section is a two-dimensional silhouette or a reverse projection of the object that is blocking the light.

A single point of light casts only a single shadow, known as an "umbra." The shadow is divided into three parts for a non-point or "extended" source of light: umbra, penumbra, and antumbra. The more diffuse the light source, the more blurred the shadow. Shadows appear to attract and merge when two penumbras overlap. This is referred to as the shadow blister effect.

Visual artists are typically acutely aware of colored light emitted or reflected from multiple sources, which can result in complex multicolored shadows. Chiaroscuro, sfumato, and silhouette are examples of artistic techniques that make use of shadow effects on purpose.Thus, A shadow is a dark patch that forms when an object blocks the path of light.As a result, no light reaches the shadow region, resulting in a black shadow. As a result, the color of the shadow is unrelated to the color of the object because the light is always absent there.

Note: Viewers who aren't used to seeing shadows in three dimensions may find fog shadows strange. A thin fog is just dense enough to be illuminated by light passing through gaps in a structure or a tree. As a result, the path of a shadow cast by an object through the fog becomes visible as a darkened volume. These shadow lanes are, in some ways, the inverse of crepuscular rays caused by beams of light, they're caused by the shadows of solid objects.