Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Both red and blue LEDs were fixed on a plate. When the LEDs were turned off, all LED bulbs were seen as 242-243 dark-brown spots (A. Light off). When red LED was turned on, red-colored light could be seen (B. Red light). When both red and blue LEDS were turned on, the pink-colored light could be seen (C. Red and blue light).
