An interior decorator knows that mirrors add light to a room. Mirrors can create an illusion that a small room is much larger than it appears.

I've thought about how wonderful it would be to take a class on the subject of light. All those issues about particle and wave, and how light can be bended or not. The subject about reflected light, gravity and light, black holes and light, the role of light in spirituality. The concept of God's light is present across time and many different religions. Halos and auras, and the ranges of light some insects and other creatures can see with their eyes but we humans cannot. Flowers have patterns in ultraviolet ranges of light that are like an invitation and map to hummingbirds and butterflies and bees.

But back to mirrors. Were there a physicist at my side this very moment, I'd ask, Do mirrors multiply light?