describe an experiment to show that white light is made up of seven colours
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Issac Newton was the first to use a glass prism to obtain the spectrum of sunlight. He tried to split the colours of the spectrum of white light further by using another similar prism. However, he could not get any more colours. He then placed a second identical prism in an inverted position with respect to the first as shown.
This allowed all the colours of the spectrum to pass through the second prism. He found a beam of white light emerging from the other side of the second prism. This observation gave Newton the idea that the sunlight is made-up of seven colours.
This allowed all the colours of the spectrum to pass through the second prism. He found a beam of white light emerging from the other side of the second prism. This observation gave Newton the idea that the sunlight is made-up of seven colours.
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take a transparent prism.
take a torch.
take a piece of cardboard and cut it in such a way that there is a hole which can focus a beam of light passing through it.
fix it on the torch.
now,allow the beam of light to pass through the prism.
you will find that as soon as white light is passed through a prism,it splits up into it's constituent colour which are Red,Orange, yellow,green,blue,indigo and violet.
this indicates that white light is made up of seven colour.
take a torch.
take a piece of cardboard and cut it in such a way that there is a hole which can focus a beam of light passing through it.
fix it on the torch.
now,allow the beam of light to pass through the prism.
you will find that as soon as white light is passed through a prism,it splits up into it's constituent colour which are Red,Orange, yellow,green,blue,indigo and violet.
this indicates that white light is made up of seven colour.
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