Why are only x-rays used to screen the luggage at stations?

X-ray is having the advantages compared to other electromagnetic wave due to its lower wavelength (order of 0.01 to 10 nanometers) and hence higher frequency (30 petahertz to 30 exahertz). read more

X-ray used for screen the luggage and medical radiography is generally hard X-ray with wavelength (below 0.2–0.1 nanometers, equivalent to size of atom) with photon energies between 5-10 Kev. This hard X-rays are capable of penetrating to higher depth due to higher intensity and detect the deeper events too. read more

The xray is used as a quick way to screen bags without having to open each and every one. That's what would have to happen without the xray. Each bag would have to be physically searched for prohibited items. read more

Their baggage limitations are not only insane but completely irrational, such as no electronics, knives, or alcohol. I don't care to be following their rules or not since my baggage contents are no danger to anyone and transporting them is not illegal. read more