The radio frequency energy of mobile phone ranges from 30 kilohertz to 30 gigahertz. Do you know how mobile phones emit the radio frequency radiation? Mobile phones it from their antennas. When we are on a phone call, our head will very close to it, this led to our body will absorb this energy.  

Because that mobile phones are usually put at side of the head when we are on a call, there’s a concern that mobile phones might cause or contribute to tumors in that area, such as Malignant brain tumor. It was also founded that there was a consistently recognized biological effect on radio frequency radiation in humans, which is heating. 

Hence, we should not spend a long time using mobile phone.

 For example, clocks, watches and dials that glow-in-the-dark without the use of a battery may contain radium or tritium.  If these older timepieces are opened and the dial or hands handled, some of the radium could be picked up and possibly ingested.In the body, radium acts similar to calcium, so the radium that human ingested will be deposited into their bones. Many of the workers of the production of radium dials developed bone cancer, especially in their jaws.

Besides that, ceramics made until the 1970s may have glazes colored with radionuclides while vaseline glass, or canary glass, contains a small amount of uranium which gives the glass its yellow-green color. Cloisonné jewelry also gets some of its yellow, orange and off-white colors from small amounts of uranium in the glaze.

Radioactive antiques can continue to emit very low-levels of radiation for thousands of years, if not longer. Although the amount of radiation these items emit is small, however it can still register on a hand-held Geiger counter if the object is close enough to the monitor.

Hence，we should not attempt to take apart radium watches or instrument dials. Radioactive antiques are usually not a health risk as long as they are intact and in good condition.We should also avoid using ceramics like antique orange-red Fiestaware or Vaseline glass to hold food or drink. They can chip, and you can ingest particles of uranium with your food or drink.Lastly, we should immediately dispose any broken radioactive antiques. For instructions on proper disposal,you can contact your state or local radiation control program.

 

Mobile phone is an important part of in our daily life. It is efficient communication devices and make life easier. However, mobile phone emits low levels of non-ionizing radiation when we use. The type of radiation emitted by mobile phone is also referred to as radio frequency (RF) energy. They are low-powered radiofrequency transmitters, operating at frequencies between 450 and 2700 MHz. The handset only transmits power when it is turned on. The power radiofrequency exposure falls with increasing distance from the handset. For example, when using a “hands free” device, it has a much lower exposure to radiofrequency fields than holding the handset against head. Federal Communications Commission (FCC) limit for public exposure from cellular telephones is an SAR level of 1.6 watts per kilogram (1.6 W/kg), which is save for humans. If our body will absorb excessive radio frequency (RF) energy, it may affect our health condition.

 

The primary concern with mobile phone and cancer is the development of brain tumors associated with mobile phone usage. Since mobile phone are usually hold near the head, it might cause or contribute to tumors in the area. For example, gliomas (brain) and tumors of the salivary glands.

 

For now, there is currently no consistent evidence that non-ionizing radiation increases cancer risk in humans. But if you're concerned about the possible link between mobile phone and cancer, consider limiting your use of mobile phone.

            Among all of the electronic appliances and devices like mobile phones, microwave ovens, etc., laptops are one of the highest sources of the toxic Electromagnetic Field (EMF) radiation. Based on some research done by the World Health Organization’s International Agency for Research on Cancer (IARC), EMFs are ‘possibly carcinogenic to humans’. They believe that there is a possible link between EMFs and cancer in people.

            Laptops’ underside releases high-frequency radiation, emitting 40 to 100 milliGauss EMF, which is higher than the standard limit of EMF exposure. Studies have shown that people exposed to high levels of EMF for years at a time showed an increased risk of leukaemia in adults. An apparent link between EMF and leukaemia in children was also uncovered by scientists. However, they said that the monitoring of EMF was not enough, so they couldn’t come to any conclusions yet.

            According to scientists, EMFs can affect our bodies’ nervous system function and cause damage to body cells. Cancer and unusual growths may be one symptom of a very high EMF exposure. Other symptoms may include headache, insomnia, dizziness, appetite loss and weight loss, fatigue, and so on. Nevertheless, the diagnosis from symptoms is unlikely and the symptoms of EMF exposure are vague.

            Instead of worrying about EMFs, we should simply be aware of the radiation released by laptops and reduce the risk of being exposed to them. We ought to keep our laptops in another room or downstairs when we sleep. Other than that, we must leave the laptop alone when we aren’t using it. Moreover, we could just use the speaker function or Bluetooth earbuds rather than earphones, so the radiation will not be able to travel into our bodies easily. And of course, we need to distance ourselves from the laptop and don’t be too near to it when we are using it to decrease the chances of exposure to the radiation. To sum it all up, we should unplug ourselves from our laptops and go out once in a while or take a quick weekend getaway to breathe some fresh air.

Some foods contain naturally-occurring radionuclides such as potassium, carbon, radium and their decay products. However, these foods do not pose a radiation risk because the amount of radiation is very small. 

Food will gain radioactivity in a few ways. Firstly, food will gain radioactivity by uptake which the roots of plants take in radionuclides from rocks and minerals present in the soil. Secondly, radioactivity in food will be gained by deposition which the radioactive particles in the air settle onto crops. Thirdly, food will gain radioactivity through bioaccumulation when the radionuclides accumulate in animals that ingest plants, feed, or water containing radioactive material. For examples, fish will take up radioactivity from water or sediments. In turn, it could be eaten by humans as part of their diet. 

There are some examples of food that contain naturally-occurring radionuclides. The most well-known examples are bananas and Brazil nuts. According to scientific research, bananas contain potassium which a small fraction of it is radioactive. Each banana can emit 0.1 micro Sieverts of radiation which is only a very small amount of radiation. Same as bananas, Brazil nuts contain potassium, but they also contain a small amount of radium taken up from the soil . Examples for daily products include cheese; examples for meat and fish include fish, sausage and eggs while the examples for fruits and vegetables include potatoes, white bread and berries.

Natural radiation in food should not be confused with food irradiation. Food irradiation is a process that uses ionizing radiation to improve the safety and extends the shelf life of foods in order to prevent foodborne illness and food spoilage. During this process, bacteria, molds and other pests in food will be killed. The irradiated food does not come into contact with radioactive materials, and it does not make foods radioactive or compromise nutritional quality in food. 

In conclusion, natural radiation in food does not require any special actions because the radiation levels are extremely low. Thus, food is safe to consume by humans.

One common everyday example of radiation in my daily life that I use is the computer. Computer is a electronic device which is crucial to everyone for various examples such as education, business, entertainment and many more.

Computers emit non ionizing radiation. We are exposed to this type of radiation from numerous sources—cell phones, electric blankets, microwaves, AM/FM radio, etc.

Radiation from computer cannot be seen by the naked eyes, but it can pose real dangers to our health. If we use the computer directly in front of us for long hours, it exposes us to quite more intense radiation that are harmful. It has been said that the amount of radiation emitted by desktop computers is generally higher than that which is emitted from Laptop or notebook computers. Furthermore, computer battery operates and this plays a major role in reducing the rate of radiation emitted from computers but internal parts of computer heat up and radiate. There is a generation of Extremely Low Frequency (ELF) by computer from storage and computing processing. Prolonged exposure to this radiation may produce biological effects on human health. 
For now, there is currently no consistent evidence that non-ionizing radiation increases cancer risk in humans. One should be aware of the possibility of eye strain, back problems, etc from sitting in front of the screen for long periods. According to the American Academy of Ophthalmology (AAO), "there is no convincing scientific evidence that computer video display terminals (VDTs) are harmful to the eyes."  The common complaints of eye discomfort and fatigue are associated with ergonomic factors such as distance from the person to the monitor, monitor height and brightness, etc.

 

Research about radiation associated with mobile phone antennas can affect human health had been done by scientists since the 1990s. Mobile phone's antennas use various bands of radiofrequency, which may overlap with the microwave range (1 GHz to 1000 GHz) which are very harmful to human health.

In 1996, the International EMF (Electromagnetic Field) Project was established by World Health Organization (WHO) to look for the scientific evidence of possible health effects caused by EMF in the frequency range from 0 to 300 GHz. The scientists have stated that the research has been conducted into possible health effects, which is exposure to the frequency spectrum. 
 But as long as the exposures are below the limits recommended in the ICNIRP (1998) EMF guidelines, 0–300 GHz, such exposures won't produce any health effect.

But based on the epidemiologic studies, it shows that assessment of EMF exposure related risk in developing various cancers. Also, the epidemiologic studies proved the relationship between intracranial cancer and mobile phone using exist. 

Well, according to the International Agency for Research on Cancer (IARC) , which is an agency of World Health Organization (WHO), wireless radiation are possibly carcinogenic, which means there could be some risk of carcinogens. 

According to the statement above, there are studies and researches proving that the radiation (radiofrequency) emit by the mobile phone's antennas or wireless radiation may have the possibility in harming our own health. So, we should make sure if the radiofrequency of the mobile devices that we are using won't overlap the microwave range to keep us away from the health effect of radiation exposures. 

 WiFi has became an essential usage for everyone who is living in the modern life. The exposure to such electromagnetic radiations can also have consequences on human health. Too much exposure to radiations continuously will lead to cancerous cells that is produced by EMFs which are emitted by the radiation and are absorbed by our body. The greater the distance between ourselves and the router, the less radiation that will be absorbed by our body. 

As a conclusion, we can always take a break from the cyber network in the world as we have been exposed to various radiations that are transmitted by the electrical appliances and devices. We could occasionally turn off the WiFi router and just breathe in some fresh air as well as read a novel that has been trending.

Microwave ovens are one of the examples of radiation in daily life. It emits thermal radiation to heat up food. How does thermal radiation heat up food, you’d ask? It emits electromagnetic waves and microwaves. Magnetron is placed inside the microwave oven that produces microwaves. The metal interior of the oven reflects microwaves to the food causing the water molecules in food to vibrate. Microwave energy is changed into heat energy when absorbed by food. Hence it does not make food “contaminated” and is safe for us to consume.

Some may have mentioned that microwaves reduces the nutritional value in food, that is untrue. In fact microwave oven maintains more of the vitamins and minerals as it takes lesser time to cook and adding water is not neded.

lnfrared light is often divided into the near infrared, which is closest to the visible spectrum, and far infrared, which is emitted by warm objects. To send a signal to a television, remote controls often use a diode that emits light at around 940 nanometers in wavelength, which falls into the range of near-infrared light.

Some digital cameras have filters to block near-infrared light, but most can detect it. It shows up on the screen as if it were visible light. When you press a button on the remote control, the camera may show a pulsing light emitted by the remote. The pulses are coded to control the television.

Infrared light and visible light interact with materials in different ways. Near-infrared light passes through clear glass and will reflect off metal surfaces, including mirrors. Infrared light passes through most black plastic trash bags, so you should be able to control your television even with the remote covered in plastic.

Laptop computer emits electromagnetic radiation. This is the visible light given off by the laptop's screen that makes it possible for you to see what the computer is displaying. Infrared radiation given off by all parts of the laptop due to their temperature, through the everyday process of thermal emission. Most of this thermal radiation consists of infrared waves.  For hotter temperatures, the thermal radiation can include visible light and even ultraviolet rays. Radio waves given off by the WIFI antenna and Bluetooth antenna in the laptop, which are used to connect to a wireless network. Some of the radio waves come the leak of the electronic circuitry inside the laptop. Nuclear radiation including gamma rays. This nuclear radiation emitted through the natural radioactive decay of atomic isotopes in the computer's materials. Small amounts of nuclear radiation from the radioactive decay these unstable isotopes. All objects that emit visible light are emitting radiation because light is a radiation. But all of the radiation emitted by the laptop is low-frequency and low-intensity to be harmful to humans.

All the forms of radiation mentioned above are typically harmless to humans. Many health problems such as headache, cardiac disease, burning sensation, redness, fatigue are related to long time exposure of radiation. Inappropriate use of a computer can cause muscle and joint pain, overuse injuries of the shoulder, arm, wrist or hand and eyestrain. Therefore, we should take a rest after a long period of using the computer especially during the Lockdown days we had been using the electronic devices for a long period to carry on online lesson. These are the some of the high-energy radiation is harmful to humans. For example, exposure to ultraviolet rays, X-rays, gamma rays, and nuclear radiation such as alpha rays, beta rays, neutron radiation, and proton radiation. This may lead to mutation, cancer and radiation sickness. Hence, we should have a well organized timetable for the usage of an electrical device.