Amazing Facts about Light

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Importance of Light

Can you imagine your life without light? Have you ever thought about how difficult it would be for us to live without light? Sounds impossible right? Don’t you think we should appreciate the existence of light on the Earth? It’s high time we learn some interesting facts about light and the important roles it plays in human life. Image source: www.mercola.com

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Importance of Light
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Light is an Energy

Light is the fastest thing in the Universe. It travels at the speed of 300,000 km per second. Light is the only type of energy which is visible to the human eye. Image source: www.createapk.com

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Light is an Energy
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The Sun

The biggest source of light energy is the Sun. Even though the Sun is far away from the Earth, it has the power to transfer incredible amount of energy to our planet. Image source: www.stv.tv

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The Sun
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Life on Earth

Without light, the human race, plants and all the other living creatures would not survive. Plants need light to make food by the process of photosynthesis. Humans and animals need light to see. We have the sense of sight because of light. Image source: www.newhdwallpapers.in

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Life on Earth
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Life without Light

The light energy from the Sun provides heat which controls the temperature of the Earth. Without heat, our planet would be too cold for us to survive. Image source: www.wrcc.dri.edu

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Life without Light
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Existence of Light

If the Sun suddenly disappears from the Universe, nobody from the Earth would realise until 8 minutes and 17 seconds, the time taken by light to reach the Earth. The best part is the Sun has about 5 billion years of light energy left for us. Image source: www.trekearth.com

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Existence of Light
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Light in Water

Sunlight has the power to reach a depth of 80 metres (262 feet) in the ocean. Image source: www.nationalgeographic.com

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Light in Water
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The need of Light

Humans need exposure to light because it provides ultraviolet B (UVB) rays which help the body produce vitamin D. Vitamin D maintains the balance of calcium in our body; this in turn keeps our bones and teeth healthy. Image source: www.brainhq.com

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The need of Light
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