luminance

The Perseid meteor shower is back for its annual display, dotting our skies with its signature bright, streaking trails at peak luminance.

Early in life, when newborns receive strongly limited color information, the brain is forced to learn to distinguish objects based on their luminance, or intensity of light they emit, rather than their color.

Conventional blue OLEDs typically require around 4 V for a luminance of 100 cd/m2; this is higher than the industrial target of 3.7 V -- the voltage of lithium-ion batteries commonly used in smartphones.

But at dawn and dusk, when males of the species swoop and dart in the pale luminance to attract a mate, they really shine.

In their quiet luminance, the scars left from the Rupture almost disappeared.