Shadows are formed when ___________ objects come in the path of light.

Correct option is D

​The correct answer is (d) Opaque.

Shadows are formed when opaque objects come in the path of light because these objects block the light completely. Light cannot pass through them, leading to the formation of a shadow on the opposite side.

• For a shadow to form, there must be:
1. A light source.
2. An opaque object blocks the light.
3. A surface on which the shadow is cast.

Information about other options:

• Translucent objects: These allow partial light to pass through and create faint, unclear shadows. Example: Frosted glass or thin fabric.
• Transparent objects: These allow light to pass through completely without blocking it, so no shadow is formed. Example: Clear glass or water.
• Luminous objects: These emit light rather than blocking it, so they do not cast a shadow themselves. Example: The Sun, a glowing bulb.

Information Booster:

Shadows and Their Types:

Depending on the light source, shadows can be:

1.      Umbra: The darkest part of the shadow where light is completely blocked.

2.      Penumbra: The lighter part of the shadow where light is partially blocked.

Importance of Shadows in Science:

•  Shadows demonstrate the rectilinear propagation of light (light travels in straight lines).
• They are used in sundials to determine time-based on the position of the shadow.