A black paper absorbs light of all the colours and reflects none.

Answer

**Step-by-Step Solution:**

1. **Understanding the Color of Black Paper:**
- Black paper appears black because it does not reflect any light. Instead, it absorbs all wavelengths of visible light.

2. **Behavior of Light on Black Paper:**
- When light, such as sunlight, strikes the black paper, the paper absorbs all the colors present in the light spectrum. This includes red, orange, yellow, green, blue, indigo, and violet.

3. **Reflection of Light:**
- Since black paper absorbs all colors, it reflects none. This means that no light is bounced back to our eyes, which is why we perceive the paper as black.

4. **Conclusion:**
- Therefore, the statement "A black paper absorbs light of all the colors and reflects none" is true.