Radiation Safety Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

1,000 electron volts is equal to 1 kiloelectron volt (keV). The prefix "kilo-" denotes a factor of one thousand, so when you see "keV," it refers to thousands of electron volts.

In terms of units, 1 keV corresponds to 1,000 eV, thus making it the correct choice. Understanding the unit conversions within the context of particle physics and radiation safety is important, as these measurements often indicate energy levels of particles, photons, and other radiation.

MeV (megaelectron volts), GeV (gigaelectron volts), and PeV (petaelectron volts) represent much larger scales of electron volts, with each prefix indicating a multiplication factor of a thousand compared to the previous one. Therefore, while those units are related to electron volts, they do not correspond directly to 1,000 eV specifically.