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Lazy eye is an early childhood condition where a child's eyesight in one eye does not develop as it should. The problem is usually in just one eye, but can sometimes affect both of them. The brain focuses on one eye more than the other, virtually ignoring the lazy eye

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White light contains 7 colours red, orange,yellow,green,blue,indigo & violet.if you mix all these colours you get the colour white.
Hypothisiss
1.If primary colours are mixed the you get secondary colours
2.IF secondary colours are mixed the you get the colour white.

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A digram for light

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Light is a beam of energy that moves in a wave

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Light travels at about 186,000 miles per second [300,000 kilometers per second]. Light from the sun takes about 8 minutes to go 93 million miles (149 million kilometers) to earth. Really long distances can be measured in light years. This would be the distance that light can travel in a year, or 5,865,696,000,000 miles

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1. When whales communicate with each other under water, their sound can travel up to 800 km in the ocean.

2. Flies cannot hear at all.

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767 miles per hour is the speed of sound.

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When the vibrations are fast, the sound is high. When the vibrations are slow, the sound is low.

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Sound is energy that is made by vibrations

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The world's longest - lasting light bulb , the centennial light in California , has reportedly been burning from  1901 till today .But with a few interruptions during  power failures
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This is the link I found this fact from :
http://gizmodo.com/20-facts-about-light-to-brighten-your-curiosity-1679945054

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Sounds over 120 decibels are painful to human ears.

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The loudest animal in the world
The blue whale is much louder than a jet, which reaches only 140 decibels!
The second-loudest animal on Earth is the howler monkey (Alouatta) from the jungles of Central and South America.

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The loudest scream recorded is 128 decibels !

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Space does not have any light. We can see things in space due to light bouncing off of the objects in space.

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Light travels at approximately 299, 792,458 meters per second!

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Light can travel in both photons and electromagnets.
It is also a type of energy and is a form of electromagnetic radiation.