Radioactivity
Bayani Gaba-gaba
Radioactivity is happening all around you right now: faint radiation from rocks, the air, your food and even outer space passes through you every second. Unstable nuclei throw out radiation at random, and learning to identify and measure it is the heart of nuclear physics.
In this lesson you will learn what background radiation is and where it comes from, how radiation is detected and counted, and the nature, ionising effect and penetrating power of alpha, beta and gamma radiation. You will also see how they behave in electric and magnetic fields and how to correct a count rate for background.
Manufura
- Know what is meant by background radiation
- Know the sources that make a significant contribution to background radiation including: (a) radon gas (in the air) (b) rocks and buildings (c) food and drink (d) cosmic rays
- Know that ionising nuclear radiation can be measured using a detector connected to a counter
- Use count rate measured in counts / s or counts / minute
- Describe the emission of radiation from a nucleus as spontaneous and random in direction
- Identify alpha (α), beta (β) and gamma (γ) emissions from the nucleus by recalling: (a) their nature (b) their relative ionising effects (c) their relative penetrating abilities (β+ are not included, β-particles will be taken to refer to β-)
- [Supplement] Use measurements of background radiation to determine a corrected count rate
- [Supplement] Describe the deflection of α-particles, β-particles and γ-radiation in electric fields and magnetic fields
- [Supplement] Explain their relative ionising effects with reference to: (a) kinetic energy (b) electric charge
Darasin Sauti
Saurari wannan darasi a cikin manhaja
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Radioactivity. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which is a source of background radiation? A. radon gas B. a torch battery C. a magnet D. sound waves Answer: A
- Alpha radiation is best described as: A. an electron B. a helium nucleus C. an electromagnetic wave D. a proton Answer: B
- Which radiation is stopped by a few millimetres of aluminium? A. alpha B. beta C. gamma D. none of them Answer: B
- Which radiation is NOT deflected by a magnetic field? A. alpha B. beta C. gamma D. all are deflected equally Answer: C
- A counter reads 90 counts/s near a source; background is 10 counts/s. The corrected count rate is: A. 100 counts/s B. 80 counts/s C. 9 counts/s D. 10 counts/s Answer: B
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
-
Sashen littafi
Nuclear Radioactivity
The discovery and study of nuclear radioactivity quickly revealed evidence of revolutionary new physics. In addition, uses for nuclear radiation also emerged quickly—for example, people such as Ernest Rutherford used it to determine the size of the nucleus and devices were painted with radon-doped p
"College Physics: Nuclear Radioactivity" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-physics/pages/31-1-nuclear-radioactivity. Access for free at https://openstax.org/books/college-physics/pages/1-introduction
-
Sashen littafi
Radiation Detection and Detectors
It is well known that ionizing radiation affects us but does not trigger nerve impulses. Newspapers carry stories about unsuspecting victims of radiation poisoning who fall ill with radiation sickness, such as burns and blood count changes, but who never felt the radiation directly. This makes the d
"College Physics: Radiation Detection and Detectors" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-physics/pages/31-2-radiation-detection-and-detectors. Access for free at https://openstax.org/books/college-physics/pages/1-introduction
Wasu ƙungiyoyi ne suka wallafa su ƙarƙashin lasisin buɗe, kuma muna ambaton su yadda suka nema. Hanyoyin suna buɗe shafukansu.
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Radioactivity? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
