The cathode is the negative terminal of an LED. It is the shorter leg of the LED and it is connected to ground. When electricity is applied, the negatively charged electrons flow from the cathode to the anode, which makes the LED light up.
The cathode is the negative terminal of an LED. It is the shorter leg of the LED and it is connected to ground. When electricity is applied, the negatively charged electrons flow from the cathode to the anode, which makes the LED light up.