1. The Sun: The Sun is the most obvious example. It's a giant ball of hot gas that produces its own light through nuclear fusion.
2. A Light Bulb: Whether it's an incandescent, fluorescent, or LED bulb, these devices convert electrical energy into light.
3. A Candle Flame: The heat from a burning candle causes the wax to vaporize and combust, creating a bright, luminous flame.
Let me know if you'd like more examples!
