Which poses more of a danger to human health, very long wavelength radiation or very short wavelength radiatio?
A little bit of detail would be great please!
Radiation Dangers
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The shorter wavelengths are more of a danger, i.e. ultra-violet, x-ray and gamma radiation. Longer wavelengths as used in TV, cellphones and radio are generally harmless.
The shorter ones (Gamma Xray, UV) are more dangerous, they have a much greater frequency.
c = f?
c is fixed = 3 x 10^8
Hence if ? is smaller, f must be bigger to compensate.
Infrared light is invisible but can warm the skin without danger if not too concentrated and hot. It has wavelengths longer than visible light. Ultraviolet light is also invisible but can penetrate thin clouds and cause sunburns even on overcast days. It has shorter wavelengths than visible light. Radiation with even shorter wavelengths such as X-rays (penetrate skin and bones) and gamma rays (penetrate thicknesses of lead) have even shorter wavelengths and are more energetic and penetrating.
It has been decided that the further along the frequency spectrum (towards higher frequencies), that the more dangerous something can be to our bodies. After violet come ultraviolet, whose rays have been known to cause skin cancer. Next comes X-Rays, which cause radiation poisoning and can lead to cancer. Past that you get gamma rays, which are extremely harmful and cause all different kinds of cancer and cell mutation. However, scientists now speculate that the frequncies that cell phones emit can possibly cause cancer as well, despite the fact that they have much longer wavelengths than the forementioned rays. Who knows about that theory, but i would keep my answer to very short wave lengths.
Very short wavelength radiation is more dangerous.
1. The more energetic radiation is, the more danger is poses.
2. The energy of radiation is directly proportional to frequency: E=hf
where f is the frequency and h is planck’s constant
3. frequency is inversely proportional to wavelength: c=?f where c is the speed of light (which is fixed) f is the frequency and ? is the wavelength, so f=c/?
4. Substitute substitute f=c/? into E=hf and we get:
E=hc/?
h and c are fixed constants, so you can see that energy is inversely proportional to wavelength: when the wavelength is decreased, the energy increases, so the wave becomes more dangerous.