She knows how different wavelengths of light stimulate three types of cone cells in the retina, and she knows how electrical signals travel down the optic nerve into the brain.
Ia tahu bahwa panjang gelombang cahaya berbeda dapat menstimulasi tiga tipe sel kerucut (reseptor warna) di retina, dan bagaimana cara sinyal elektrik menelusuri syaraf mata menuju otak.