Question

Radiation present in atmosphere due to
different radioactive substances are
called​

Answer 1

Answer:

Radiation present in the atmosphere due to different radioactive substances are called cosmic radiation.

Explanation:

The radioactive substance must be kept in a thick lead container with a very narrow opening, to stop radiations coming ou from other directions such that it absorbs the radiations which strike on its walls from inside. A thin metal sheet can easily control alpha particles, but for B-particles, we Weed a thick metal sheet.

Hence, Radiation present in the atmosphere due to different radioactive substances are called cosmic radiation.

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Answer 2

Answer:

Radiation present in atmosphere due to different radioactive substances is called​ natural background radiation.

Explanation:

Radiation present in atmosphere due to different radioactive substances are called​ natural background radiation.

• It is the radiation present in the atmosphere which is not due to deliberate introduction of radiation sources.
• Background radiation includes both cosmic radiation and terrestrial radioactivity.
• Cosmic radiation from the sun, our galaxy, and beyond contributes to natural background radiation.
• On earth's surface, it originates from a variety of sources, both natural and artificial.
• The natural sources are the radioactive materials in soil, water and air, and the man-made are medical X-rays, fallout from nuclear weapons testing etc.

Hence the radiation is all around us,  varying from place to place and over time, depending on the amount of naturally-occurring radioactive elements in nature, weather conditions, altitude and latitude.