Is it true that the arrangement of the colours of the spectrum in ascending order of a wavelength is indicated by VIBGYOR?

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True

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answer is A.

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Detailed Solution

The above statement is true.
When a white light ray passes through a prism, it splits into its seven constituent colours. This phenomenon is called the Dispersion of light. In the spectrum, violet has a minimum wavelength, and red has a maximum. Red is found at the top and violet at the bottom. It is due to the fact that different components of white light travel at different speeds in the prism. Different components of white light deviate at different angles when passing through the prism. The correct sequence of colours is violet, indigo, blue, green, yellow, orange, and red. It's indicated by VIBGYOR.

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