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Landscape in Koorvere. Otepää nature park .

 

If  the sun, on a cold winter day, shines into your room, but you don’t want to, or can’t, go outdoors, then you have a chance to study how colours are absorbed. Find a light-coloured wall or cupboard door, that the sun doesn't shine on directly. With different-coloured clothes on (kids love this changing of clothes!) and spinning around so that sun rays are reflected from the clothes, children see at once that some colours reflect and are reflected, but not others, or very weakly. With a black jumper the case is clear at once, it swallows all the light and there is nothing to be seen on the wall; a shiny black material however can reflect a little too.
The absorption of light is particularly well visible if the surface to where the rays are reflected is in a dark corner, and not in the sunny room. And so one phenomenon of physics has been demonstrated!