In a Young’s double slit experiment, a laser light of \( 560 \, \text{nm} \) produces an interference pattern with consecutive bright fringes’ separation of \( 7.2 \, \text{mm} \). Now another light is used to produce an interference pattern with consecutive bright fringes’ separation of \( 8.1 \, \text{mm} \). The wavelength of second light is _______ \( \text{nm} \).
