Effect of em rays
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Electromagnetic waves travel at the speed of light through space or a medium. The wavelength and frequency of these waves are inversely related by the formula f*λ = c, where f is frequency, λ is wavelength, and c is the speed of light. For a given medium, the speed of light does not change, so higher frequency waves have shorter wavelengths, and lower frequency waves have longer wavelengths. Electromagnetic fields are present everywhere and invisible to humans. Electric fields are created by voltage differences and magnetic fields are created by electric currents. Both decrease in strength with distance from their source.
Effect of em rays
- 3. Electromagnetic waves travel through space at the speed of light , and the wave length and frequency of an electromagnetic wave are inversely related by mathematical formula f*λ =c or f=cλ Or λ=c/f Since the speed of light in a given medium does not change ,high frequency
- 4. ELECTROMAGNETIC FIELDS Electric fields are created by differences in voltage: the higher the voltage the stronger will be the result & field. Magnetic field are created when electric current , the stronger the magnetic field if current does not flow the strength of the magnetic field will be constant. Electro magnetic field are present every where in our environment but are invisible to human .
- 5. Electric field arise from Magnetic field arise voltage. from current . There strength is There strength is measured in volts per measured in ampere meter (V/m). per meter (A/m). An electric field can be Magnetic fields exist as present even when a soon as device device is switched off. switched on. Field strength Field strength decreases with decreases with distance from the distance from the source. source. Most building Magnetic fields are not materials shield attenued in most electric field to some materials extend.
- 9. Effect of radiation due to following rays :- Alpha rays Beta rays Gamma rays X-rays