Why people think that radiation is menace?

Answer 1

Well, if they have taken steps to become sufficiently well informed, perhaps they are right. And it depends upon the type of radiation. Radiation merely means that the energy is traveling out as if it were rays from the centre of a circle.

Ionizing radiation is normally not all that good for one, but provided you take care to minimize your exposure, it should not prove an undue hazard. Your normal daily dose of ionizing radiation will come from background radiation, about which little can be done. Some of this normal level comes from foods containing potassium. 40K (potassium) decays naturally and will emit ionizing radiation and this element is essential for life. Your normal exposure to this will come from foods containing potassium, and from being close to other folk, who naturally contain 40K.

Your dentist will advise you as to the prudent level of exposure to dental x-rays. High altitude (particularly polar) flights will also expose you to a higher level of ionizing radiation. But thousands of folk experience these normal 'doses' without undue hazard.

UV radiation is something you can minimize and which confers no associated benefit. Stay away from sun beds. They are a real hazard. And use sunscreen when on the beach or in the snow.