Question

The minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164kJ/mol.

Calculate the longest wavelenght visible to the human eye

Answer 1

E = hc/lambda
Change 164 kJ to J, then change to per photon (divide by 6.02 x 10^23). Solve for lambda.

Answer 2

1.37*10^6