Which colour of the light has the longest wavelength?

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Accepted Answer

1. **Visible Spectrum Range:** The visible spectrum of light ranges from violet to red. 
2. **Wavelength Comparison:** According to the standard values given in the NCERT text, violet light has the shortest wavelength (~400 nm) and the highest frequency, while red light has the longest wavelength (~750 nm) and the lowest frequency .
3. **Order:** The order of increasing wavelength is Violet < Blue < Green < Red.

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