If the camera detects the instantaneous energy of the incoming wave, it will give 6 flashes per second on the viewfinder.greswd said:ELF electromagnetic radiation is in the range of 3 to 30 Hz.
If you had a 3Hz ELF laser pointer and you had a camera that could "see" ELF, would you be able to see the intensity of the beam "flicker" at 3Hz?
You get the frequency spectrum as Fourier transformation of the time (or space) distribution. If your time range is too small, your frequency range gets large. You can still see "there was something", but you cannot measure the frequency precisely. This can be treated as purely classical effect, but it is closely related to the uncertainty principle in quantum mechanics.greswd said:Why could it not make more than one picture a second?
With coherent light, it will have 6 intensity maxima, yes.tech99 said:If the camera detects the instantaneous energy of the incoming wave, it will give 6 flashes per second on the viewfinder.
I would question whether coherent detection can be applied to random events. I am guessing what is meant is direct conversion to zero IF.Andy Resnick said:Slightly off-topic: Stephen McGreevy did great work- he recorded VLF/ELF events as sound:
http://www.auroralchorus.com/more.htm
http://www.auroralchorus.com/
He uses coherent detection, BTW.
tech99 said:I would question whether coherent detection can be applied to random events. I am guessing what is meant is direct conversion to zero IF.
Intensity flicker refers to the rapid and unpredictable changes in the strength or amplitude of Extremely low frequency (ELF) waves. These waves are typically generated by man-made sources such as power lines and electrical equipment.
The effects of intensity flicker on humans are still being studied, but it has been linked to symptoms such as headaches, dizziness, irritability, and fatigue. Some studies have also suggested a possible connection to increased risk of certain health conditions.
Intensity flicker is caused by fluctuations in the electrical current flowing through power lines and equipment. These fluctuations can be caused by changes in power demand, weather conditions, or other factors.
Yes, intensity flicker can be measured using specialized instruments such as flicker meters. These meters detect changes in the amplitude and frequency of ELF waves and provide a numerical value for the level of flicker present.
There are several methods that can be used to reduce intensity flicker, including implementing power line filters, using more advanced power system designs, and limiting the amount of power drawn from a single source. Additionally, continued research and understanding of the effects of ELF waves and intensity flicker can help inform regulations and guidelines for minimizing exposure.