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  1. T

    Lift a weight up with an EM switch

    Hello, My question is simple. Let's suppose you have an electromagnetic coil with a magnetic weight in the center of it. This coil is energized, and the weight is lifted up vertically. Now, my weight is 30 kgs. I want to lift it to a height of 1 meter. How do I calculate how much power is...
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    What happens when an electron is hit by a laser beam?

    Light sails use mirrors, I was aware of them before. But I am specifically asking what direction an electron would be scattered in, in the presence of a laser. Can a laser be used to guide an electron for instance? Or does the scattering take place in all angles?
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    What happens when an electron is hit by a laser beam?

    Just a quick question. We know that an accelerated electron shoots out light, and light that falls on an electron in an atom, excites it. But what happens to an electron in vaccum, when it encounters a laser beam? If an electron beam from an electron microscope, were to to intercept a laser...
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    Does light affect the magnetization of a material?

    My question is really basic, and I've ended up getting a bit confused because of it. My understanding is that magnetism of a material is based upon the intrinsic electron spin, the rotation of the electron around an atom, and the movement of electrons within a material, i.e- current. So...
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    Maximum distance of quantum tunneling using an STM

    Okay. That's brilliant. Thanks a lot soothsayer. You've been a great help. Kudos to you. :)
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    Maximum distance of quantum tunneling using an STM

    Hey! Thanks for the replies, you two. But the thing is, the image resolution is not so important for me here. The purpose for which I aim to use the STM in this instance, doesn't demand that. All I need is a tunneling current from the tip of my STM and a metallic conductor that is seperated by...
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    Maximum distance of quantum tunneling using an STM

    Hey there, I'm pursuing a degree in Msc. Nanoscale science, and I've been studying about Scanning tunneling microsopes that use Quantum tunneling to study the surface struture of materials. My question is: What is the maximum distance between the surface that's been studied, and the STM tip...
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    Masters in Nanotech from UK or USA

    First of all, is a course in Nanotechnology or Nanoscience worth it or is it just a lot of hype? What can I do after a masters in Nanotech/science? Is it better to do it in UK or in USA? USA has only two colleges that offer this course, namely Rice and SUNY-Albany. But, there are a lot...
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    Any published authors here?

    ah.. okay... cool... :smile:
  10. T

    A really basic question.

    k... will put it on my list. :smile:
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    Amplitude of Electromagnetic wave?

    How come the energy of an electromagnetic wave depends only on its frequency? Given by E = hf. How come the energy depends only on the frequency of the wave and not on the magnitude of the E component of the wave? Doesn't the energy depend on the amplitude? Or is there no such thing?
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    Any published authors here?

    Nah, it is not about the Idea itself. Its just a fun read. Anyway, I was asking about query letter tips and the like. For example, check this site out: http://www.indiahowto.com/list-of-publishers.html anyway... thx. Lets see how it goes.
  13. T

    A really basic question.

    Hmmm... that is a good Idea. Ill try ignoring the equations. I am not going to study physics in coll anyway. I just have an interest. Anyway... thanks...:approve:
  14. T

    Any published authors here?

    ha, lol. That I know, I am fully aware of vanity publishers. And naw, its nothing about physics at all. Its just story about a guy who just gets out of college and tries an Idea about some software. He then realizes that things are not that easy and basically what happens after that. Its a...
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    A really basic question.

    Hmmm... Well, I did read the brief history of time. It was interesting, but it didn't seem tough. But I guess as ZZ said, only someone who knows physics would be able to understand why its tough. I have a long way to go. Consequently, I got the Feynman series of lecture books and although...
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    Any published authors here?

    Ah, yeah... Its pretty simple overseas. But there are a few reputable publishers in India. Its not the same thing. I have been to many sites, I just thought there maybe someone here.
  17. T

    A really basic question.

    Hmmmm... I suppose a deeper understanding of QM is required before I understand. Okay, thank you, I will read on, on my own. Someday, the quantum weirdness is bound to seep in... :biggrin:
  18. T

    Any published authors here?

    Hey, Anyone here have any experience with publishing books? I wrote a book and am trying to get it published. Any Tips / tricks on how to go about the thing? :wink:
  19. T

    A really basic question.

    Hmmm, well that just puts more questions in my head. Is there an explanation of what set about this orbiting in the first place. As far as I have read here and there, the reason the planets move in a curved path is because the Huge mass of the sun curves space - time and hence even though...
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    A really basic question.

    I doubt that its the same thing. The moon hovers above the Earth only because the Earth is in constant motion. Its sort of like a dance that they do, the earth pulling on the moon, the moon pulling on the earth and they both in turn being pulled by the sun. But, that's not the case with the...
  21. T

    A really basic question.

    Okay, thanks, I did. That cleared up a lot of things. But, I am assuming smeared means you plot the probability of the particle in an area where it is most probable to occur. So, is the electron around the nucleus or is it attached to it? And if it hovers above the nucleus, what forces...
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    A really basic question.

    This is a really basic question but, why are the electrons revolving around the nucleus, why not just stick to the protons in the nucleus? And since, the electrons repel, it would explain the reason for the space between the atoms right? Anyway an atom is electrically neutral, so that also...
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    An electromangetic switch

    I have attached a diagram and no this is not a commercial product, a friend of mine made this. The diagram is a sketch of the system.
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    An electromangetic switch

    So, I have an electromagnetic switch. Which works in this way. A rod has 4 magnets attached to the front of it and 4 magnets attached to the back of it. In the center there is the winding. When I apply current to it, the rod moves towards one end and hits a steel plating on that side fixing...
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    Do we also travel at a fixed velocity?

    Thank you for your replies, So, the way I understand what you people have said so far is this: 1) All velocity is judged from an initial rest frame. 2) Light has no initial rest frame, so judging velocity from its perspective is meaningless. Okay... this is just like another one of...
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    Do we also travel at a fixed velocity?

    Since, light is always travelling at a constant velocity with respect to everything else, does it also mean that everything else is also travelling at a constant velocity with light? As in, since light is always travelling at C irrespective of our velocity, then does it not also mean that we...
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    IQ tests.

    The whole concept of intelligence is highly overrated as far as I can tell. I would consider someone intelligent if they can put two and two together, as in, if they can say okay, take chocolate cake and vanilla ice cream... Now if we put it together then it would taste much better... That is...
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    Reactance is equal

    Now if we take the impedence for a circuit. Xc for the capacitive component and Xl for the inductive component and equate them, that is we equate the impedance then we can get the same impedance from both a capacitive as well as a inductive load, we get something like this. Now, in...
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    Zeitgeist the movie, Real? or just Real crap?

    Zeitgeist the movie, I watched a downloaded version of it. It can be seen online for those who haven't at this site, http://www.zeitgeistmovie.com/ Its an awesome movie and if its true, its a real eye opener, if its not... Man, I sure got fooled... XD Now some people claim that its...
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    What happened to PF chess?

    Its been quite sometime now since, pf chess has disappeared... I thought it would come back after sometime... but no... So... what happened to it?
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