Question

5. All objects cast shadow on the ground.​

Answer 1

Answer:

MARK BRAINLIST ANSWER

Explanation:

Shadows are always formed on the opposite side. Transparent objects cannot form a shadow. They are only formed in opaque or translucent objects.

Answer 2

The given statement is false.

A shadow is formed when an object blocks the beams of light from a source. The shadow is formed behind the object and is dark in colour as no light is able to reach that point.

As said before, the object has to block the light rays. This means that we have to exclude transparent objects from the list, meaning that only translucent and opaque objects can form shadows. Hence not all objects cast shadows on the ground.

Knowledge Bytes:

➡ Transparent objects

Those objects that allow light beams to páss through them are known as transparent objects.

For example: Glass

➡ Translucent objects

Those objects that allow only certain amount of light beams to páss through them are known as translucent objects.

For example: Butter paper

➡ Opaque objects

Those objects that do not allow any amount of light beams to páss through them are termed as opaque objects.

For example: Carboard boxes

➡ Parts of a shadow:

✳ Umbra

Umbra is the darkest part of the shadow where no light rays reach. It is usually conical in shape.

✳ Penumbra

Penumbra is the lighter part of the shadow that forms a border. Very small amount of light may reach the penumbra portion of a shadow.