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"If the obstruction (mountain, person or screwdriver) is much bigger than the wavelength involved then the diffraction pattern will be very sharp - you get a hard shadow when you stand in front of a point source of light and so will a screwdriver."In a ripple tank experiment small obstruction give a more pronounced diffraction pattern than a large obstruction. It seems that the experiment contradicts the above statement.
Is it possible that a ling wave cause space to bend around a small obstacle. Thus the Long wave appears to bend around a small obstacle. Thus a long wave has a tremendous energy that causes space to bend.
I think the cause of confusion is the high power that longwave radio stations find it necessary to feed into their antennas, I believe Moscow runs about 500KW while the Americans working at 16KHz for submarine communication where antenna efficiency is very low put out several MW.
Can diffraction be explained as the incoming wave bending space around an obstacle. Thus as to appear that it bends around an obstacle.
mountain doesn't block radio signals,
If a transmiter is placed on one side of the mountain , is there a blind spot on the other side.
Energy of wave = hc/λ thus a long wave has a less energy. This less energy causes the space around the mountain to bend? The wave appears to bend (diffract) around the mountain. A short wave with more energy is not affected by the mountain thus no bending of space occurs.
To test my assumption lets sent a short and long wave together towards a mountain. The long wave will bend (diffract). The short wave will follow in the foot steps of the long wave. It also should diffract. Possible?
The space in a given region is 'experienced' independently by many observers at once - for instance, Electromagnetic waves of all frequencies can pass through the same region of space at once without affecting each other (this is called superposition and applies for any linear medium). So if it were as you say, they would affect each other; superposition would not happen. How can you insist that things are that way round?Where does you approach take us?