WONDER #979: How Do Automatic Doors Know When To Open?

Question 1 of 3

Automatic doors operate with the help of what?

1. magic
2. air
3. magnets
4. sensors

Question 2 of 3

Which of the following is something an automatic door sensor might sense as a trigger to open or close?

1. pressure
2. motion
3. light
4. all of the above

Question 3 of 3

Automatic doors can help conserve energy, similar to what other type of door?

1. revolving
2. screen
3. front
4. storm

Check your answers online at https://www.wonderopolis.org/wonder/how-do-automatic-doors-know-when-to-open.