Light is all around us. The Sun shines on the Earth every day and we use electric lights or candles to light our homes, schools and workplaces. We use torches or streetlights when we are out and about at night and build fires for light and warmth when we go camping. Even in the middle of the night, there is some light from the stars in the sky.
But one of my daughter’s schoolfriends asked me how light is made. And her brilliant question made me think about natural and man-made light sources.
So, let’s find out more about light – what it is and how it is made…
“I have a little shadow that goes in and out with me…”, so goes the poem ‘My Shadow‘ by Robert Louis Stevenson. My 2-year-old likes to chase her shadow when we go out walking but my elder daughter wants to know where shadows come from…
Today, we went for a stroll at Westonbirt Arboretum – a good opportunity to answer this question about why trees are green.
Trees and many other plants look green because their leaves and sometimes their stems contain a substance called chlorophyll. The word ‘chlorophyll’ comes from two Greek words that mean ‘green’ and ‘leaf’.
Rainbows are captivating. They are bright and colourful and look pretty in the sky but how are they made?
Well, to understand the answer, you need to know three things about light: