Kějiànguāng de bōcháng zài 400 dào 700 nàmǐ zhījiān.
The wavelength of visible light is between 400 and 700 nanometers.
Tips
usage
波长 is used both in physics (literal wavelength) and informally to mean being in sync with someone, 波长一样 (same wavelength) means you think alike or get along well.
