My glasses are strong enough and with high enough refractive index that if I look at a point light source through the edge of a lens I can see a rough spectrum of it. I can easily tell a true violet LED from red+blue or yellow from red+green. Used to be able to tell white LEDs from incandescent but the LEDs got much better.
My glasses are strong enough and with high enough refractive index that if I look at a point light source through the edge of a lens I can see a rough spectrum of it. I can easily tell a true violet LED from red+blue or yellow from red+green. Used to be able to tell white LEDs from incandescent but the LEDs got much better.