Tagged Questions
1
vote
1answer
58 views
Super High Frequency Electromagnetic Radiation - String Theory
I am a serious high school student with one year of physics class experience, so please point out if there are any flaws in my question or reasoning. Thanks!
Gamma ray radiation possesses a ...
14
votes
3answers
298 views
Why do prisms work (why is refraction frequency dependent)?
It is well known that a prism can "split light" by separating different frequencies of light:
Many sources state that the reason this happens is that the index of refraction is different for ...
0
votes
3answers
486 views
Intensity of light
If we have 2 beams of light with equal intensities, but with different frequencies, wouldn't the one with the higher frequency generate more power?
If so, how come the intensity, which is in $W/m^2$, ...
2
votes
2answers
110 views
What is the history behind the factors of 3 in the classification of electromagnetic radiation?
What is the history behind the factors of 3 in the classification of electromagnetic radiation?
See e.g. http://en.wikipedia.org/wiki/Radio_spectrum#By_frequency
Is this (just) inherited from the ...
1
vote
2answers
351 views
How to capture electomagnetic radiation/waves?
If I wanted to find out what kind of electomagnetic waves "travel" through my room at which frequency, what kind of equipment would I need? Suppose I want to view frequencies from 0 Hz to 6 GHz.
2
votes
2answers
449 views
Is all kind of light same speed?
Is there any speed different between blue or red color? Is there speed different? or there are same speed?
0
votes
1answer
56 views
The Synchrotron at CalTech
In the Feynman Lectures Vol. 1, it says that the Synchrotron at the California Institute of Technology is capable of producing electromagnetic Radiations with a frequency of $10^{24}$ cycles per ...
1
vote
1answer
350 views
Relationship between classical electromagnetic wave frequency and quantum wave function + de broglie frequency
As it is.
As I study through classical mechanics and quantum mechanics, I began to wonder whether there is a relationship between classical electromagnetic wave frequency and quantum wave function ...
3
votes
2answers
981 views
The energy of an electromagnetic wave
The intensity of an electromagnetic wave is only related to its amplitude $E^2$ and not its frequency. A photon has the same wavelength as the wave that's carrying it, and its energy is $h f$.
So ...
4
votes
2answers
13k views
Why does wavelength change as light enters a different medium?
When light waves enter a medium of higher refractive index than the previous, why is it that:
Its wavelength decreases?
The frequency of it has to stay the same?
4
votes
5answers
992 views
How many colors exist?
How many "colors" do exist?
Our perception:
As far as I know, colors are just different frequencies of light. According to wikipedia, we can see wavelengths from about 380 nm und 740 nm. This means ...
5
votes
5answers
1k views
How to Make RF Waves Visible
I understand RF (Radio Frequency) Waves are electromagnetic waves and a mode of communication for wireless technologies, such as cordless phones, radar, ham radio, GPS, and television broadcasts. Most ...
0
votes
1answer
171 views
range of infrared light
I notice in the EMS chart that only half of the IR range will travel through the earth's atmosphere. So in the range of frequencies that penetrate the atmosphere what frequency travels farthest?
7
votes
3answers
642 views
Can we transport energy over infinite distances through vacuum using light?
I know that light (or electromagnetic radiation in general) attenuates in intensity as the square of the distance it travels.
Why does it attenuate?
Are the photons being scattered by the medium ...
