Flashcards
4.4.5-Electromagnetic waves
Flashcards do conjunto (9)
- 1Common properties of electromagnetic wavesThey can all travel through a vacuum.
All possess both a magnetic wave and an electrical wave interlocked and at right angles to each other.
In free space, they all travel at the speed of light, c, or 2.98x10^8ms^-1.
They are all transverse waves.
They can all be reflected, refracted and diffracted.
They can all demonstrate interference.
They can all be polarised. - 2Radio/microwaves wavelength, frequency and method of production.
- 3Radio/micro waves method of detection and uses.
- 4infra red/visible light/ultraviolet Wavelength, frequency and method of production.
- 5infra red/visible light/ultraviolet method of detection and uses.
- 6x-ray/gamma rays Wavelength, frequency and method of production.
- 7x-ray/gamma rays method of detection and uses.
- 8Non-ionising electromagnetic radiationRadio waves, microwaves, infrared and visible light do not have enough photon energy to remove electrons from the shells of atoms. They cannot produce ions and so are called non-ionising radiations. Ionisation can lead to human cell mutations that can cause diseases such as cancer. Therefore these electromagnetic radiations are deemed as relatively safe.
- 9Ionising electromagnetic radiationUltra violet, x-rays and gamma rays radiation all have high photon energies. This means they can cause ionisation by knocking electrons from the shells of atoms. This can lead to cell mutations.
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- A level Physics (4.4- Waves) FlashCards sobre 4.4.5-Electromagnetic waves, criado por Ben Geeman em 29-03-2017.
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- Ben Geeman
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