161k views
2 votes
What does a barcode reader emit to identify bar codes?

A.
electric pulse
B. magnetic pulse
sound
D.
E.
light
electromagnetic pulse

User BlackWasp
by
7.0k points

2 Answers

4 votes

Answer:electromagnetic pulse

Step-by-step explanation:

User MikaAK
by
6.6k points
3 votes

Answer: E light

Step-by-step explanation:

User BALKANGraph
by
7.1k points