Assertion: Wood is an example of an opaque object.Reason:Shadow forms ...
Assertion: Shadow forms when light falls on a wooden block.
Reason: Wood is an example of an opaque object.
Wooden blocks can indeed cast shadows when light falls on them, and wood is an example of an opaque object. Let's examine each statement in detail to understand why both the assertion and reason are true and why the reason is the correct explanation of the assertion.
Assertion is true
When light falls on a wooden block, a shadow is formed. This is a common observation that can be easily verified by conducting a simple experiment. If we place a wooden block in the path of a light source, such as a lamp, and position a screen behind it, we will observe a shadow of the block on the screen. This occurs because wood, like many other objects, obstructs the path of light, preventing it from passing through.
Reason is true
Wood is considered an opaque object. Opaque objects do not allow light to pass through them. Instead, they absorb or reflect light. When light falls on a wooden block, it cannot penetrate through the material, and as a result, a shadow is formed on the opposite side of the block. The shadow is an area where light is blocked by the opaque object, preventing it from reaching the surface beyond it.
Reason is the correct explanation of the Assertion
The reason provided correctly explains why a shadow forms when light falls on a wooden block. The opaque nature of wood causes it to obstruct the path of light, leading to the formation of a shadow. If wood were transparent or translucent, light would be able to pass through it, and shadows would not be cast. Therefore, the reason supports and explains the assertion accurately.
To summarize, both the assertion and reason are true, and the reason is the correct explanation of the assertion. When light falls on a wooden block, a shadow is formed due to the opaque nature of wood, which prevents light from passing through.