Question

Effects of EM Radiations on Humans. Human bodies constantly absorb, reflect, and emit EM radiation. What are the maximum permissible exposures (MPE) for different range of frequencies? Explain the difficulties and possible solutions to quantify an excessive exposure level. Minimum one page, single-spacing. Cite your references.

Answer 1

The Electromagnetic(EM) Radiations can be classified as ionizing and non-ionizing radiations.As Em radiation emitting devices like laptop,mobiles,lasers etc. are in large numbers these days, Human bodies constantly absorb, reflect, and emit EM radiation.However, there are limits for exposure of this radiation which is expressed in W/Kg (Watts per Kilogram).These limits which are also known as SAR(specific absorption rate) limits are on based on frequencies of EM radiation.

SAR basic restriction on human bodies for frequency range of 100 kHz - 6 GHz is 0.08 W/Kg and 0.4 W/Kg in uncontrolled and controlled environments respectively.According to ICNIRP(International Commission on Non-Ionizing Radiation Protection), the EM radiation limit is 2 W/Kg upto the frequency 300GHz.

Excessive EM radiation will affect the human health in bad manner.Some effects are cancer, chest pain, heart problems, brain fog and chronic pain etc.To protect from dangerous EM radiation, there are many methods like keeping EMR emitting equipments in some distance while not using them and reduce the use of bluetooth & ear-phones etc.