I am making a DIY spectophotometer. What you see in this photo is flask of methyl orange solution in water with blue led in the back in a black box. As you can see the surrounding is blue because the box reflect blue light, however the light coming through the flask is orange. I don't understand why, blue LED gives narrow spectrum of blue light (450-500 nm from wikipedia). So there should be no orange color (600 nm or mix of green 500-570 nm and red 610-760 nm). Thank you.