Alkenes and non conjugated dienes usually have absorption maxima below 200nm. Compounds that have conjugated multiple bonds have maxima at...

Alkenes and non conjugated dienes usually have absorption maxima below 200nm.Compounds that have conjugated multiple bonds have maxima at wavelengths longer than200nm. Explain with a molecular orbital diagram, how the conjugation of multiple bondsbrings about absorption of light at longer wavelengths.