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2021-05-16 03:49:59
00:28:17
Urdu
conceptual questions for class 12 Physics conceptual questions of chapter 18 part 4 exercise short questions solved dawn of modern physics conceptual questions class 12 Physics lectures FSC physics 2nd year physics kpk board Physics Federal board Physics candle academy Pakistan physics lectures in Urdu physics lectures in Hindi
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candle academy pakistan
conceptual questions of Don of modern physics @ candle academy Pakistan.
this is lecture 20 of chapter 18 dawn of modern physics for class 12 Federal and kpk board Physics.
this lecture is part 4 of conceptual questions of chapter 18.
conceptual questions 18.1 3 , 18.1 4 , 18.15, 18.1 6 and 18.1 7 are solved.
Conceptual question 18.13
Does a light bulb at a temperature of 2500 Kelvin produce as white a light as the sun at 6000 Kelvin? Explain.
Conceptual question 18.14
A beam of red light and a beam of blue light have exactly the same energy. Which light contains the greater number of photons?
Conceptual question 18.15
In Compton scattering experiment, an electron is accelerated straight ahead in the direction of incident x-ray photon. Which way does the scattered photon move? Explain.
Conceptual question 18.16
Why must the rest mass of photon be zero? Explain
Conceptual question 18.17
What happens to the total radiations from black body if its absolute temperature is doubled?
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