Recent content by sriecewit

Yep. I'm reffering to something like an FM radio. But, trying to extend the context to something like binary modulation, as in BPSK, how can one explain what kind of photos then wave has? BPSK signal has photons of constant energy in between until the carrier wave encounters a phase shift...

Hi Guys, I have a doubt. When we think of a modulated wave, consider frequency modulation for example, does the wave contain photos of gradually changing energy (or frequency)?

Thanks for the help Guys ! :smile:

Are photons associated with the phase property? Aren't they just energy packets, whose energy varies as the frequency times the constant? Let me put it in this way. What all parameters does specify a photon?

Can you elaborate the third one a bit? More specifically, with respect to BPSK modulation, where the photons needs to be transmitted continuously. What difference does the photos experience when phase transition happens? Srini

Hi All, I wonder if the modulation of RF waves (Amplitude Modulation, Frequency Modulation, and Phase Modulation) can be explained in terms of photons. Thanks, Srini

Hi Guys, I have a question. Can we attempt to explain the phase change of a carrier wave in terms of photons? For example consider GPS signal. It is BPSK modulated, in which phase change of 180 degrees happens for multiple of 1540 cycles of the carrier. How is the phase information...

yeah. So practically speaking, does it really matter if you put it in the beginning or later? Its the same hardware and same signal flowing. So you would eventually get the similar signal output right? I'm still not convinced with the mathematics of friis formula.

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Hi Guys, Can anyone help me with the intuitive understanding of the friis formula? I'm not able to contemplate the fact that when you put LNA in the front-end of a circuit, overall noise figure is less. The same hardware, you put it after a few circuitry, the noise figure goes up. How...

If its stored in the form of an Electric field, then does the charge configuration of the atom change? I'm thinking that, for electric field to change, either charge has to change, or distance has to change between two quantities. Here, when an atom absorbs a photon, then its radius will...

What does it mean, "Electron absorbs a photon" ? Hi Guys, I'm new to QED, and I was going through wikipedia link. I didn't understand what does it mean when they say an electron absorbs a photon. All I was taught in school, is that the process involves a shift in the energy level of an...

Except linear I have taken other courses you have mentioned. Maybe I will study linear algebra and then start with mathematics of QFT. Is that a good idea? - Srini

Hi Judah, Thanks for the quick start link on QED. But is there any way I can understand the mathematics of QED (starting from the basic model of an atom). I'm interested in learning the theory and my math is just at the undergrad level. - Srini