Does sunlight through glass still give what the plants need to survive?
Light exists in 2 states, photons and waves. Chlorophyll, in its various states, captures the lightwaves in the visible spectrum as well as the far red and some infrared. Lightwaves travel through glass with very little loss. If the glass is opague, some light is absorbed by the glass and some passes through. Stained glass absorbs whichever lightwave that the colour correlates with and lets the rest through. This could result in slightly abnormal growth e.g etiolation, phototropism. So, to answer your question, yes, sunlight through clear glass still gives plants what they need to survive. Sunlight through opague glass still gives plants what they need to survive provided the plant is shade tolerant and sunlight through coloured glass will also give plants what they need to survive, but not all.
