A natural light source refers to any source of light that occurs in nature and is not created by human activity.
- The Sun is the most prominent and important natural light source on Earth, providing sunlight that powers life, such as through photosynthesis in plants.
- Stars emit light naturally due to nuclear reactions in their cores, which generate massive amounts of energy released as light.
- Fire can occur naturally through processes like lightning strikes igniting dry vegetation or volcanic activity.
- Bioluminescence is the natural emission of light by living organisms such as fireflies, some fungi, and deep-sea creatures.
- Auroras (like the Northern and Southern Lights) are natural light displays in the Earth’s atmosphere, caused by the interaction of solar wind with the Earth’s magnetic field.
- Lightning is another natural light source, produced during electrical storms when electrical charges in clouds discharge.
- Natural light sources vary in brightness, spectrum, and duration.