Final answer:
Radiation from a 'dirty bomb' is undetectable by human senses, and without specialized detection instruments, it is difficult to know if one has been exposed, potentially leading to radiation sickness.
Step-by-step explanation:
The statement is referring to the fact that radiation from a 'dirty bomb'—a type of explosive device that combines conventional explosives with radioactive material—cannot be detected by human senses.
Unlike other hazards such as fire or toxic gases, radiation cannot be seen, smelt, felt, or tasted, which poses a serious risk since individuals at the scene won't know if they're exposed without the use of specialized detection instruments. This characteristic makes radiation exposure particularly insidious; individuals may not realize they're at risk until they develop symptoms of radiation sickness.
Radiation refers to the emission or transmission of energy in the form of waves or particles through space or a material medium. It exists in various forms and can originate from natural or human-made sources. Here are some key aspects:
Types of Radiation:
Electromagnetic Radiation: This includes visible light, radio waves, microwaves, infrared radiation, ultraviolet light, X-rays, and gamma rays. They vary in wavelength and energy.
Particle Radiation: This includes alpha particles, beta particles, and neutrons, which are emitted from radioactive materials or nuclear reactions.