It's probably best to be more precise about what you don't understand about what you've read.merlyn said:Yes. I didn't know how to phrase the question.
I thought I could get a more succinct and definitive answer here.
I just wanted the basic mechanism explained, or at least a reference.PeroK said:It's probably best to be more precise about what you don't understand about what you've read.
It needs to be somewhat smaller than half a wavelength diameter to block radiation. Not to do with diffraction.merlyn said:Could someone explain to be the reason why size of the hole or grating in the case of Faraday cage is what determines if the screen or grating is opaque or transparent? I'm pretty sure it has something to do with interference patterns in classical physics.
Thank you all in advanced.
Wonderful...Why? What are the physics?tech99 said:It needs to be somewhat smaller than half a wavelength diameter to block radiation. Not to do with diffraction.
Do you have any references which I can explore further?tech99 said:The hole behaves as a very short piece of metallic waveguide. If it is smaller than certain critical dimensions it is cut-off and will not support propagation of a wave.
Another way to look at is that large holes create surface impedance which reduces the flow of current in the surface, which is necessary for reflection.
And another way to look at it is that resonant slots will radiate as they deflect surface currents around them.
Could it be resonance? The effect doesn't have a peak; it's just a high pass function.tech99 said:resonant slots will radiate
The size of holes or grating is directly related to the wavelength of light. As the wavelength of light decreases, the size of holes or grating must also decrease in order to produce the same diffraction pattern. This relationship is described by the diffraction limit, which states that the size of the diffracting element must be on the same order as the wavelength of light in order to produce a diffraction pattern.
The size of holes or grating has a significant impact on the diffraction pattern. Smaller holes or grating will produce a diffraction pattern with more closely spaced fringes, while larger holes or grating will produce a diffraction pattern with more widely spaced fringes. Additionally, smaller holes or grating will produce a more intense diffraction pattern, while larger holes or grating will produce a less intense diffraction pattern.
The wavelength and size of holes or grating are crucial in spectroscopy as they determine the resolution and accuracy of the measurements. A smaller wavelength and smaller holes or grating will result in a higher resolution, allowing for the detection of smaller variations in the light spectrum. Additionally, the size of holes or grating can be adjusted to select specific wavelengths of light, making it an important tool in studying the composition of materials.
The optimal size of holes or grating for a specific experiment depends on the desired resolution and the wavelength of light being used. In general, the smaller the wavelength, the smaller the size of holes or grating should be. Additionally, the size of holes or grating can be adjusted to optimize the intensity of the diffraction pattern. Careful experimentation and analysis can help determine the optimal size for a specific experiment.
Yes, the size of holes or grating can be manipulated to produce specific diffraction patterns. By adjusting the size and spacing of the holes or grating, scientists can control the intensity and spacing of the diffraction pattern. This allows for the selection of specific wavelengths of light and the enhancement of certain features in the diffraction pattern, making it a useful tool in various scientific applications such as spectroscopy and microscopy.