Attenuated total reflection ZnSe Prism uses the property of total internal reflection and attenuates the reflected light by forming an evanescent wave while penetrating some (0.5-2µm) into the sample. The penetration depth into the sample depends on the refractive index of sample and prism, incident angle, wavelength, sample contact, and reactivity of the material. This prism is useful in Fourier Transform Infrared (FTIR) spectroscopy to analyze the sample properties.
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