The document discusses various topics related to light including: 1) The speed of light is approximately 227,000 kilometers per second in a vacuum and slower in other mediums like water and glass. 2) Common sources of light include thermal radiation from hot objects. 3) Different types of light pollution are described such as light trespass, over-illumination, glare, and sky glow. Light pollution can negatively impact ecosystems and animal habitats.

1. by:Josh Replogle Power of Light

2. The speed of light is estimated to be 227,000 kilometers per second. It takes 3 seconds at the speed of light to get to the sun. Speed of light

3. There are many sources of light. The most common light sources are thermal: a body at a given temperature emits a characteristic of black body radiation. Sources of light Sources of light

4. “Many of the effects of natural light may put whole ecosystems in danger.” By changing the environment on which animals develop and reproduce, natural light effects their lives and the growing of their species.” Enviromental effects of light

5. Categories of light pollution include light trespass, over-illumination, glare, clutter, and sky glow. Light trespass occurs when unwanted light enters one's property by shining over a neighbor’s fence. Over-illumination is the excessive use of light. Glare is the result of contrast between bright and dark areas in the field of view. Clutter refers to continues groupings of lights. Sky glow refers to the "glow" effect that can be seen over populated areas. Light pollution

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7. Light By: DJ Castillo

8. speed of light is about 227,000 kilometers per second takes about one-third of a second for the speed of light to get to the moon Speed of Light

9. The most common light source is thermal. Sources of Light

10. Many of the effects of natural light may put whole ecosystems into imbalance. By modifying the playing field on which animals develop, meet, and reproduce, natural light their lives and the growing of their species. Enviromental Effects of Light

11. Categories of light pollution include light trespass, over-illumination, glare, clutter, and sky glow. Light trespass occurs when unwanted light enters one's property by shining over a neighbor’s fence. Over-illumination is the excessive use of light. Glare is the result of excessive contrast between bright and dark areas in the field of view. Clutter refers to excessive groupings of lights. Sky glow refers to the "glow" effect that can be seen over populated areas. Light Pollution

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13. By Andrew Lopez Light Within

14. Light Speed Light travels 299,792,458 meters per second. In water, the speed of light slows to 140,000 miles per second. Its speed is 124,000 per second in glass. Through a diamond, the speed of light is 77,500 miles per second.

15. Light Sources There are many sources of light and one of the sources are thermal light: a body of given temperature emits a characteristic of black body radiation.

16. Light pollution There are different types of light pollution:Light trespass, over-illumination, glare, clutter, and sky glow. Light trespass occurs when unwanted light enters one's property. Over-illumination is the excessive use of light Glare is the result of excessive contrast between bright and dark areas in the field of view Clutter refers to excessive groupings of lights. And Sky glow refers to the "glow" effect that can be seen over populated areas.

17. Environmental effects of light “ Many of the effects of natural light may put whole ecosystems in danger. By changing the environment on which animals develop and reproduce, natural light effects their lives and the growing of their species.”

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