What does a transistor do? a. allow a current in one direction only b. amplify an electronic signal c. convert an analog signal into a digital signal d. combine thousands of diodes and resistors

Answer;

b. amplify an electronic signal

Explanation;A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is an electronic component that can be used as an amplifier, or as a switch. It is made of a semiconductor material. Transistors are found in most electronic devices. Transistors are made of semiconductor material with three or more terminals used to connect to an external circuit.

Blue light reflected from the ball enters human eyes.