IR OPTICAL CAN BE FUN FOR ANYONE

 5a]. The absorption edge for samples VT400 and VT700 transpired at ~ 503 nm and ~ 470 nm. Conversely, the transmittance lessened slightly with increasing substrate temperature in the NIR spectra range, which could be attributed to the massive particle measurement and lack of porosity for VT700. Figure 5b shows the reflectance spectra f