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Natural Radioactivity | 10th class physics ch 18 natural Radioactivity | physics wallah sabaq • related searches • 1. radioactivity chemistry • 2. radioactivity physics • 3. radioactivity in hindi • 4. radioactivity class 12 • 5. radioactivity class 10 • 6. radioactivity chemistry class 9 • 7. radioactivity in urdu • 8. radioactivity as level physics • 9. radioactivity and nuclear chemistry • 10. radioactivity animation • 11. radioactivity and its applications • 12. radioactivity alpha beta gamma decay • 13. radioactivity and nuclear chemistry bsc 1st year • 14. a level radioactivity • 15. radioactivity by physics wallah sabaq • 16. radioactivity by sindh board teaching • 17. radioactivity by pradeep gopi • 18. radioactivity by edupoint of science • 19. radioactivity class 9 • 20. radioactivity chemistry class 11 • 21. radioactivity class 11 • 22. radioactivity definition • 23. radioactivity discovery • 24. radioactivity don't memorise • 25. radioactive decay • 26. radioactivity documentary • 27. radioactivity experiment • 28. radioactivity explained • 29. radioactivity edupoint science • 30. radioactivity explain in hindi • 31. radioactivity explanation • 32. radioactivity equation • 33. radioactivity experiment by becquerel • 34. radioactivity friends physics • 35. radioactivity for class 10 • 36. radioactivity grade 10 • 37. radioactivity graph • 38. radioactivity grade 12 • 39. radioactivity half life • 40. radioactivity hindi • 41. radioactivity half life physics • 42. radioactivity in chemistry • 43. radioactivity in physics • 44. radioactivity ilm ki dunya, • 45. radioactivity in nuclear physics • 46. radioactivity in chemistry in hindi • 47. radioactivity jee • 48. radioactivity jee mains • 49. radioactivity jee advanced • 50. radioactivity jee mains questions • 51. radioactivity jee questions • 52. radioactivity khan academy • 53. radioactivity lecture • 54. radioactivity law • 55. radioactivity lecture in hindi • 56. radioactivity measurement • 57. radioactivity mcq questions • 58. radioactivity o level physics • 59. radioactivity o level • 60. radioactivity of uranium • 61. radioactivity physics class 12 • 62. radioactivity questions for neet • 63. radioactivity science • 64. radioactivity topic • 65. radioactivity theory • 66. radioactivity youtube • 67. 10th class physics ch 18 natural radioactivity • 68. natural radioactivity class 10 • 69. natural radioactivity grade 10 • 70. natural radioactivity 10 class physics • 71. natural radioactivity sabaq • 72. natural radioactivity ilm ki dunya nhi kainaat • 73. natural radioactivity haytham • 74. natural radioactivity khan • 78. natural radioactivity academy • 79. natural radioactivity foundation • 80. natural radioactivity friends • 18.2 NATURAL RADIOACTIVITY • In 1896, Becquerel accidentally discovered that uranium salt • crystals emit an invisible radiation that can darken a • photographic plate. He also observed that the radiation had the • ability to ionize a gas. Subsequent experiments by other • scientists showed that other substances also emited radiations. • The most significant investigations of this type were conducted • by Marie Curie and her husband Pierre. They discovered two • new elements which emitted radiations. These were named • polonium and radium. This process of emission of radiations by • some elements was called natural radioactivity by Marie Curie. • Subsequent experiments performed by Henrey Becquerel • suggested that radioactivity was the result of the decay or • disintegration of unstable nuclei. • The spontaneous emission of radiation by unstable nuclei is • called natural radioactivity. And the elements which emit • such radiations are called radioactive elements. • Three types of radiation are usually emitted by • substance. They are: alpha ( ) particles; beta ( ) particles; and • • • gamma ( ) rays. These three forms of radiations were studied • • by using the scheme shown in Fig. 18.3. The radioactive source • is placed inside the magnetic field. The radiation emitted from • the source splits into three components: and -radiations • • bend in opposite direction in the magnetic field while • .. .. .. .. . . .. .. .. • -radiation does not change its direction. • #naturalRadioactivity • #sabaq • #freeonlinevideolectures
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