What Is a Solar Panel?
What Is a Solar Panel? A solar panel consists of a group of photovoltaic cells linked together. As their name suggests, these cells convert light (“photo”)...
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When Can a Rainbow Be Seen?
When Can a Rainbow Be Seen? After a shower of rain there is often a rainbow. Rainbows form when the sun begins to shine through the clouds while the air is still filled...
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Why Can’t We See the Stars in the Daytime?
Why Can’t We See the Stars in the Daytime? The stars are shining all the time, day and night. We cannot see stars in the daytime because the sun is so bright. In all...
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How Does a Prism Produce Colors?
How Does a Prism Produce Colors? A prism is a piece of glass or other see-through material that has several flat sides, called faces. Many prisms have three long faces...
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Why Do Leaves Turn Brown in the Fall?
Why Do Leaves Turn Brown in the Fall? The leaves of trees turn brown in autumn when they lose a green substance called chlorophyll. All spring and summer the leaves on...
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