(a) What is spectrum? What is the name of glass shape used to produce a spectrum?
(b) How many colours are there in a full spectrum of white light? Write the various colours of spectrum in the order, starting with red.

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Solution

(a) A spectrum is a band of seven colours produced when a beam of white light is passed through a transparent glass prism. To produce a spectrum of white light, a triangular glass prism is used.

(b) There are seven colours in a full spectrum of white light. The various colours of a spectrum in their order, starting with red, are as follows.
Red
Orange
Yellow
Green
Blue
Indigo
Violet

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Similar questions

What do you understand by the term spectrum ? Name the various colours present in the spectrum of sunlight.

A ray of white light is passed through a glass prism and spectrum is obtained on a screen.

(a) Name the seven colours of the spectrum in order.

(b) Do the colours have the same width in the spectrum ?

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