Glow worm is an example of _____ source of light.

Options

A. Natural
B. Artificial
C. Both A and B
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding Light Sources**: There are two types of light sources: luminous and non-luminous. Luminous sources emit their own light, while non-luminous sources do not emit light but can reflect light from other sources.

2. **Defining Luminous Sources**: A luminous source is an object that produces its own light. Examples include the sun, stars, and light bulbs. These sources can be seen because they emit light.

3. **Defining Non-Luminous Sources**: Non-luminous sources do not produce their own light. They can only be seen when illuminated by a luminous source. Examples include the moon and a book, which can be seen when light from the sun or a lamp reflects off them.

4. **Identifying the Glow Worm**: The glow worm is an organism that produces light through a natural process called bioluminescence. This means it emits light on its own.

5. **Conclusion**: Since the glow worm emits its own light, it is classified as a luminous source of light.

**Final Answer**: Glow worm is an example of a **luminous** source of light.

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