Fig. 2From: Detection of the effective refractive index of thermally modified Scots pine by immersion liquid methodData of backscattering signal obtained from thermally modified Scots pine particles as a function of refractive index of the immersion liquid. The immersion liquid is a mixture of acetone (n a = 1.358) and methylene iodide (n b = 1.73). The angle of back scattering was 29.4° and the wavelength of the light was 589.6 nm. The solid lines present Gaussian line fittingsBack to article page