In the old days when the world was black and white, a photograph used to go through a journey. First there was the ‘negative’—an image trapped in reverse luminosity, where the unlit portions looked the lightest and vice versa. Then the light and dark were made to swap places. It’s a wonder when you see a similar graph plotted in people, especially those who waltzed across the luminous history of cinema. And who more luminous than Waheeda Rehman?