Urgent physics help!! Really stuck!! Need for tomorrow!!!!

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H0lly88
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What is the effect on living cells for infra-red radiation?
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Pizzaa<3
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Any radiation absorbed by living cells can damage them by heating them. However, ionising radiations are more likely to damage living cells. This is because photons of ionising radiation deliver much more energy. They can easily kill cells, and can also cause cancer by damaging the DNA in the nucleus of a cell.
Intense Infra-red can also burn cells

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H0lly88
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(Original post by Pizzaa<3)
Any radiation absorbed by living cells can damage them by heating them. However, ionising radiations are more likely to damage living cells. This is because photons of ionising radiation deliver much more energy. They can easily kill cells, and can also cause cancer by damaging the DNA in the nucleus of a cell.
Intense Infra-red can also burn cells

Thank you ever so much!!!!!!! do you know the effect on living cells for radio waves???
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Pizzaa<3
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Have you been going through and asking for every type of wave? xD
Large doses of radio waves are believed to cause cancer, leukaemia and other disorders.
Some people claim that the very low frequency field from overhead power cables near their homes has affected their health, although this has not been reliably proven.
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H0lly88
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(Original post by Pizzaa<3)
Have you been going through and asking for every type of wave? xD
Large doses of radio waves are believed to cause cancer, leukaemia and other disorders.
Some people claim that the very low frequency field from overhead power cables near their homes has affected their health, although this has not been reliably proven.

Thank you! Yes as couldn't find the information anywhere
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Pizzaa<3
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  • radio waves
  • microwaves cause internal heating of body tissues
  • infrared radiation is felt as heat and causes skin burns
  • X-rays damage cells, causing mutations (which may lead to cancer) and cell death
  • gamma rays also damage cells, causing mutations (which may lead to cancer) and cell death







Cooking (Microwaves)

  • Microwaves are absorbed by water molecules.
  • These water molecules become heated > heat food
  • Dangers: microwaves are absorbed by living tissue Internal heating will damage or kill cells




Infrared Radiation (remote controls, toasters)

  • Any object that radiates heat radiates Infrared Radiation
  • Infrared Radiation is absorbed by all materials and causes heating
  • It is used for night vision and security cameras as Infrared Radiation is visible in daytime or night-time
  • Police use it to catch criminals, army use it to detect enemy
  • Dangers: damage to cells (burns)




Ultraviolet

  • Dangers:
    • over-exposure to UVA and B damages surface cells and eyes and can cause cancer.
      • There is a problem with current sunscreens which protect against skin burning from high UVB but give inadequate protection against free radical damage caused by UVA.
      • Dark skins are not necessarily safer from harm.
      • Sun exposure for the skin is best restricted to before 11am and after 3pm in the UK in summer months.





X-rays

  • Dangers: X-rays damage cells and cause cancers. Radiographer precautions include wearing lead aprons and standing behind a lead screen to minimise exposure




Gamma Rays

  • In high doses, gamma can kill normal cells and cause cancers
  • Gamma can be used to kill mutated cells though too.



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