Lights

Light Sources

• These are the following light sources:

• Sun

• Stars

• Fire

• Electric light bulbs

• Candle

Speed of light• Light travels much

more quickly than sound.

• The speed of light is about 300,000 km per second.

The effects of light pollution

• Light pollution destroys the wildlife in a number of ways it can:

• birds can lose their balance & fall on the ground.

• Birds can get out of control & die easily.

• Plants & trees can stop growing & stop getting their right growth.

How we can stop light pollution

• Design light filters that can stop light from going upwards.

• Facing light downwards.

• Use only the right amount of light.

There are many different things that deal with lights. Some things are...

°Lighting°Light Bulb°Speed of light°Lightning

Lightingo Lighting is a major component of energy Lighting is a major component of energy

consumption.consumption.o Lighting includes both Lighting includes both artificial light artificial light

source such as lamps and natural source such as lamps and natural illumination of interior from daylight. illumination of interior from daylight.

o Artificial lighting we have today by electric lights, but previously has been by gas lighting, candles or oil lamps.

Light Bulbo Light bulb is an artificial light that Light bulb is an artificial light that

works by incandescence.works by incandescence.o Incandescent bulbs are also called

electric lamps

Speed of Light

o The speed of light is the speed of all The speed of light is the speed of all Electromagnetic radiation in a vacuum, not Electromagnetic radiation in a vacuum, not just visible light. just visible light.

o The speed of light is denoted by the letter c or The speed of light is denoted by the letter c or constant or the Latin word constant or the Latin word Celeritas.Celeritas.

Lightning

o Benjamin Franklin made lightning by a frame Benjamin Franklin made lightning by a frame of a kite.of a kite.

o Lightning is a discharge of electricity that does Lightning is a discharge of electricity that does not always only occur during a storm or dust not always only occur during a storm or dust storm.storm.

Light• Speed of light• light moves faster than sound• 10 miles faster than sound• depends on the Earth's movement• the speed of light is most accurate• light is too fast to measure• light travels 186,000 miles a second• nothing travels faster than light

Bibliography• http://en.wikipedia.org/wiki/Light

• http://www.learner.org/teacherslab/science/light/