The Effective Length of the  System in the Conjugated

Multiple Choice

The effective length of the  system in the conjugated linear hydrocarbon hexa-1,3,5-triene, C₆H₈, is 7.4 Å. By treating the  electrons as particles in a one-dimensional box, calculate the wavelength of the lowest energy absorption in the electronic spectrum of hexa-1,3,5-triene.

A) 260 nm
B) 1820 nm
C) 140 nm
D) 202 nm