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The linear no threshold model of harm for radiation is debated but is the foundation of all nuclear protection policies. To policy, zero radiation is considered

The linear no threshold model of harm for radiation is debated but is the foundation of all nuclear protection policies. To policy, zero radiation is considered best and all increments above that, regardless of size or relative comparison to natural background radiation are bad. https://en.wikipedia.org/wiki/Linear_no-threshold_model https://en.wikipedia.org/wiki/Linear_no-threshold_model It's extremely hard to scientifically back this or challenge it due to the noise. Some people try to show that low dose radiation is measurably harmful while others try to show that it is beneficial (hormesis). The best science suggests that measurable, statistically significant harm (in the form of increased risk of lifetime cancer) begins around 100 mSv acute or 300 mSv over a period of time. If you get that, your lifetime risk of cancer goes from 42% baseline up to 43%. Natural background is about 3 mSv per year on average. https://nap.nationalacademies.org/resource/11340/beir_vii_final.pdf https://nap.nationalacademies.org/resource/11340/beir_vii_fi...

bamboozled 4y ago
So when you walk outside and into the sun, you're exposed to radiation, we need sunlight exposure to live, so again bringing up the parents comments regarding the need for "practical" advice.
- Balgair 4y ago
  By radiation here it is meant ionizing radiation, which comes in 3 major forms (exceptions do exist): 1- Alpha radiation: Basically helium atoms. Pretty harmless on the outside of your body, really really bad if inside your body. Do not eat/inhale. 2- Beta radiation: Electrons. Harmfulness varies, kinda. Stay away from it. 3- Gamma radiation: Likely what you're thinking of. These are photons. Harmfulness increases with frequency/energy of photon, mostly. Think X-rays, not UVa radiation. Aside: UVa/b isn't ionizing, it just so happens to be the same wavelength as the short channel of your DNA strand and has a small, but noticeable, chance of breaking up your DNA. The biology of a sunburn is somewhat complicated, so please research on your own. Wear sunscreen and you're fine. With ionizing radiation you need to wear a lot of lead to be fine. Other forms of harm exist for every known particle, but you'd need to stand right inside of the LHC to experience it or be cosmically unlucky (for say, neutrino based ionizing radiation).
  - bamboozled 4y ago
    My understanding is you actually need to wear sunscreen that blocks UVb and a lot doesn't. Which is why Zinc is preferred in places like Australia, because it actually "blocks" UVa/UVb, does'nt just stop you from getting red skin, it protects your DNA from radiation.
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bamboozled 4y ago

So when you walk outside and into the sun, you're exposed to radiation, we need sunlight exposure to live, so again bringing up the parents comments regarding the need for "practical" advice.

Balgair 4y ago
By radiation here it is meant ionizing radiation, which comes in 3 major forms (exceptions do exist): 1- Alpha radiation: Basically helium atoms. Pretty harmless on the outside of your body, really really bad if inside your body. Do not eat/inhale. 2- Beta radiation: Electrons. Harmfulness varies, kinda. Stay away from it. 3- Gamma radiation: Likely what you're thinking of. These are photons. Harmfulness increases with frequency/energy of photon, mostly. Think X-rays, not UVa radiation. Aside: UVa/b isn't ionizing, it just so happens to be the same wavelength as the short channel of your DNA strand and has a small, but noticeable, chance of breaking up your DNA. The biology of a sunburn is somewhat complicated, so please research on your own. Wear sunscreen and you're fine. With ionizing radiation you need to wear a lot of lead to be fine. Other forms of harm exist for every known particle, but you'd need to stand right inside of the LHC to experience it or be cosmically unlucky (for say, neutrino based ionizing radiation).
- bamboozled 4y ago
  My understanding is you actually need to wear sunscreen that blocks UVb and a lot doesn't. Which is why Zinc is preferred in places like Australia, because it actually "blocks" UVa/UVb, does'nt just stop you from getting red skin, it protects your DNA from radiation.

deleted 4y ago

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