<div dir="ltr"><span id="result_box" class="" lang="en"><span class="hps">hello</span> <span class="hps">my dear</span> <br><span class="hps">I want to</span> <span class="hps">calculate the</span> <span class="hps">absorption</span> <span class="hps">and</span> <span class="hps">reflectivity</span> <span class="hps">transmittance</span> <span class="hps">of a material,</span> <span class="hps">how to do that</span><span class="">?<br>Thanks <br></span></span></div>