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2021-05-19 15:35:39
00:25:27
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examples of chapter 18 examples of modern physics example problems of modern physics physics examples for class 12 numerical examples solved candle academy Pakistan Federal board Physics lectures kpk board Physics lectures FSC physics college physics physics lectures in Urdu physics lectures in Hindi
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welcome to candle academy Pakistan. in lecture 23 of chapter 18 Dawn of modern physics we have solved example 18.6 to 18.10.
Example 18.6
The stopping potential to prevent electron from flowing across a photoelectric cell is 4 volt. What maximum kinetic energy is given to the electrons by the incident light?
Example 18.7
X rays of wavelength 0.2 nanometres are scattered from a block of carbon.the scattered x rays are observed at an angle of 45 degree to the incident beam.Calculate the wavelength of the scattered X-rays at this angle.
Example 18.8
Find the threshold wavelength for a photon to produce an electron positron pair.
Example 13.9
determine the wavelength of an electron that has been accelerated through a potential difference of hundred volt.
Example 18.10
A particle of mass 5 mg moves with a speed of 8 metres per second calculate the de Broglie wavelength.
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