Sodium light of wavelengths \( 650 \, \text{nm} \) and \( 655 \, \text{nm} \) is used to study diffraction at a single slit of aperture \( 0.5 \, \text{mm} \). The distance between the slit and the screen is \( 2.0 \, \text{m} \). The separation between the positions of the first maxima of diffraction pattern obtained in the two cases is _________ \( \times 10^{-5} \, \text{m} \).
