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A green flash can occur at sunrise or sunset when some part of the Sun suddenly and briefly seems to change color from red or orange to green or blue. This is an optical effect caused by the larger refraction of light at the blue/ green end of the spectrum…

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By the time sunlight reaches our eyes, most of the blue light has been scattered out. This leaves only light from the red end of the spectrum which travels towards us with little or no scattering. This is why the Sun appears red during sunsets..In dim light, everything appears to be in shades of black and white because the cone cells in our eyes which are responsible for detecting color do not work well in dim light.

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All plants use the sun to make food so this is a good example. Also the process in which plants make their food is called photosynthesis.

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Why and how they occur.

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Food and water are necessities of life. Without them, life would not exist. Believe it or not, scientists have now found bacteria than survive without them.

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What will happen to us if we lived in eternal sunlight.

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View these beautiful watery fish from home before you take the plunge!

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Plants need sunlight for photosynthesis, the process of producing food. Thus, when plants are kept away from the sunlight they bend or turn towards the light.

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Photosynthesis is the building up of simple carbohydrates such as sugars in the green leaf, which has chlorophyll, in the presence of sunlight, from carbon dioxide and water absorbed from the air and soil respectively.

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In late September or early October, if you are driving or walking in the areas of deciduous trees, you will find it hard to ignore the visual backdrop which fall provides. Magnificent sceneries and beautiful, vibrant colors will divert your attention. This leaves you wondering, how this spectacular change happens.