Question

Spectrum is a band of how many colours?​

Answer 1

Answer:

seven

COLOUR SPECTRUM

Most people can see only seven distinct colours in the spectrum: red, orange, yellow, green, blue, indigo, and violet. Just as a prism can split white light into different colours, so lights of different colour can be added together to make white light.

Explanation:

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Answer 2

Answer:

six.

Explanation:

Newton originally divided the spectrum into six named colors: red, orange, yellow, green, blue, and violet.