PHOTOELECTRIC EFFECT INTRODUCTION In 1887, photoelectric effect was invented by the scientist H. Hertz. When we passing a light into a material, […]
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Tag: SS3 ONLINE STUDY
Radioactivity is a spontaneous process. It goes on independent of external control. it is not affected by temperature or pressure […]
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Peaceful Uses of Radiation
Although scientists have only known about radiation since the 1890s, they have developed a wide variety of uses for this […]
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Radioactivity
RADIOACTIVITYRadioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability. Because the nucleus experiences […]
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Nuclear Energy
Nuclear Energy The protons and neutrons (nucleons) in the nucleus of each atom are held together by very powerful nuclear […]
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Artificial Radioactivity
If the radioactivity is induced in an element by irradiation with, for example, neutrons, the process is known as artificial […]
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Transformation of Elements
There are two types of radioactivity – natural and artificial radioactivity. The phenomenon of radioactivity was first discovered by Henri […]
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Bohr’s theory of Atom
In 1913 Niels Henrik Bohr published his new theory of the atoms constitution. Just like Rutherford he assumed that electrons rotate around the nucleus. […]
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Thompson Rutherford Model of matter
Modern atomic theory provides a reasonably satisfactory explanation of the properties of matter, the mechanisms of chemical change and the […]
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Capacitance in AC Circuits
When capacitors are connected across a direct current DC supply voltage they become charged to the value of the applied […]