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Does the existence of graviton contradict gravity being spacetime curvature? [duplicate]

Is gravity a property-curvature of space-time it's self as descriped in GR? Or the notion of 'graviton' is necessary in order to embed the 'classical GR theory' to the quantum's mechanics 'world' ...
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1answer
89 views

Why most of the minority carriers make it across the base as the base width is small?

I am studying about BJT from an online lecture note. I made a question in the image below. The reference in the image is from the two lectures, lecture 18 and lecture 19. Could anyone help me with ...
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3answers
4k views

How do forces work

Is there a mechanistic-type explanation for how forces work? For example, two electrons repel each other. How does that happen? Other than saying that there are force fields that exert forces, how ...
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1answer
925 views

Band Structure and Carrier Recombination/Generation

So i've been a bit confused, looking at PN junction, semiconductors and the like (trying to nail down how exactly semiconductors work, transistors and such). I've read the wiki on band structure (“...
2
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1answer
157 views

Potential of particle exchange

There are two heavy particles (of mass $M$) and a light one (of mass $m<<M$). The light particles interact with heavy particle with an attracting dirac delta potential V=$-\delta(q-Q_1)-\delta(q-...