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conceptual questions of chapter 18 part 2 | modern physics 18 | physics lectures for class 12 kpk


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Source channel: candle academy pakistan

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conceptual questions of dawn of modern physics @ candler academy Pakistan.
this is lecture 18 of chapter 18 dawn of modern physics for class 12 Federal board and kpk board.
in this lecture conceptual question 18.5 18.6 18.7 and 18.8 are solved.

Conceptual question 18.5
An electron and proton are accelerated from rest through the same potential difference. Which particle has the longest wavelength? Explain.

Conceptual question 18.6
All objects radiate energy. Explain why, then, are we not able to see objects in a dark room.

Conceptual question 18.7
If photoelectric effect is observed for one metal,can you conclude that the effect will also be observed for another metal under the same conditions?

Conceptual question 18.8
Explain why it is impossible for a particle with mass to move faster than the speed of light?

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