UNSW Spotlight on Physics

Felix Lempriere (Bachelor of Advanced Science / Bachelor of Computer Science Student) and Dr Kate Jackson (Lecturer and Deputy First Year Director in the School of Physics) discuss physics at UNSW!

[gowrissshanker]

Respected mam, The Energy of electromagnetic waves is classically expressed in one way which is independent of FREQUENCY (f) but in quantum mechanics it's expressed as E=h.f
Which is correct?? If one is correct why do we study another
Thank you man

[gowrissshanker]

Respected mam, I have some questions, it would be very helpful if you could answer for me, .... 1)Is it possible to produce em waves by oscillating the magnet to certain frequency?....if possible please explain how it's created sir
2)Can we produce em waves by oscillating the vandegraff generator?what's the difference between em wave produced from magnet, vandegraff, and AC current?
3)where does the energy of em wave come from?where the energy of em wave taken away from??
4) how can an object obsorb the em wave...what does black body do when em wave falls on it, does it produce out of phase light wave which destructively interfere on incident wave...how can a em wave be destroyed?
5)can linearly accelerating, circulating, spinning charge produce light? How will that light look like?
6) does all AC circuits produce em waves, will AC circuit glow visibly when its frequency is frequency of visible light....why DC current does not produce em waves.... even though electrons collide with nucleus of the conductor and losses energy and ACCELERATES?
7)Why cannot neutral objects (Eventhough having positive and negative charge) does not produce em waves ...is it possible to produce em waves by shaking or vibrating the neutral object to certain high frequencies....how black bodies produce em waves??
Thank you mam