Radioactivity can cause damage in materials and in plant, animal, and human tissue. Scientists and engineers use radioactivity as a source of heat for satellites, for medical imaging, for targeted cancer treatments, for radiometric dating, and for research into the laws of nature and the origin of matter.

Different chemical forms are used for brain, bone, liver, spleen and kidney imaging and also for blood flow studies. Used to locate leaks in industrial pipe lines…and in oil well studies. Used in nuclear medicine for nuclear cardiology and tumor detection. Used to study bone formation and metabolism.

Isotopes with a long half-life decay very slowly, and so produce fewer radioactive decays per second; their intensity is less. Istopes with shorter half-lives are more intense. In nuclear waste, isotopes with very short half-lives, say a few days or even a few weeks, are not the major concern.

Radioisotopes with short half-lives are dangerous for the straightforward reason that they can dose you very heavily (and fatally) in a short time. Such isotopes have been the main causes of radiation poisoning and death after above-ground explosions of nuclear weapons.

Click here for a closer look at half life. Radionuclides used in nuclear medicine procedures, have short half-lives. The short half-life of technetium-99m helps keep the dose to the patient low. After 24 hours, the radioactivity from the procedure will be reduced by more than 90%.

Tc-99

Ionizing radiation is radiation, traveling as a particle or electromagnetic wave, that carries sufficient energy to detach electrons from atoms or molecules, thereby ionizing them. When the dose is high enough, ionizing radiation causes two types of harm to humans: direct tissue damage and cancer.

Exposure to very high levels of radiation, such as being close to an atomic blast, can cause acute health effects such as skin burns and acute radiation syndrome (“radiation sickness”). It can also result in long-term health effects such as cancer and cardiovascular disease.

So, when you ask the question, does “Alexa” emit radiation, you’re really asking if these smart speakers give off radiation, and the answer is yes. Alexa, or Amazon Echo devices, give off a small amount of magnetic field radiation, and a reasonable amount of RF radiation.

In conclusion, there are no known health risks that have been conclusively demonstrated to be caused by living near high-voltage power lines. If there are any risks such as cancer associated with living near power lines, then it is clear that those risks are small.

Ways to reduce your exposure to cell phone radiation

1. Text, Use an earphone or a Bluetooth especially for longer conversations.
2. Limit calls in a low network area.
3. Use airplane mode for gaming (for your child)
4. Sleep without your phone.
5. Your trouser pocket is the worst place for your phone (Men)