Is Airport Security Effective? | The Scientific Breakdown

What type of energy do airport bag scanners use to detect objects inside luggage?

• Sound waves

• X-rays

• Heat waves

• Radio waves

In an airport bag scanner image, what does an orange color typically indicate about an object?

• It is made of metal.

• It is very dense.

• It is made of organic material.

• It is a liquid.

How do metal detectors work to find metal objects?

• They use sound waves to create echoes off metal.

• They generate a magnetic field that creates another current in metal objects, triggering an alarm.

• They emit light that reflects off shiny metal surfaces.

• They measure the weight of objects passing through.

What type of waves do millimeter wave scanners use, and why are they considered safer than backscatter X-ray scanners?

• They use X-rays, which are less powerful than those in backscatter scanners.

• They use microwaves, which are non-ionizing and cannot damage DNA.

• They use sound waves, which are completely harmless.

• They use infrared waves, which only detect heat.