The black board seems black because:

Options

A. it reflects every colour
B. it does not reflect any colour
C. it absorbs black colour
D. it reflects black colour

Explanation

To understand why a blackboard appears black, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Light Reflection and Absorption**:
- Light can be reflected, absorbed, or transmitted by an object. The way an object interacts with light determines its color appearance.

2. **White Light Composition**:
- White light is made up of multiple colors (like a rainbow). When light hits an object, the object can either reflect some of these colors or absorb them.

3. **Behavior of a Blackboard**:
- A blackboard is designed to absorb most of the light that strikes its surface. It does not reflect any significant amount of light back to our eyes.

4. **Resulting Color Perception**:
- Since the blackboard absorbs all the colors of light and reflects none, it appears black to us. If it reflected any light, it would appear in some color.

5. **Conclusion**:
- Therefore, the blackboard looks black because it does not reflect any color; instead, it absorbs all the light that hits it.

### Final Answer:
The blackboard seems black because it does not reflect any color.

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