• Question: what's filtering?

    Asked by jasminebrookman to Charlotte, Colin, Becki, Rick on 26 Jun 2013. This question was also asked by zoetaylor.
    • Photo: Rebecca Scott

      Rebecca Scott answered on 26 Jun 2013:

      Filtering is where you separate things. For example, I might try to separate solid particles from a liquid. If you make coffee using a filter you collect all the coffee grains in the filter paper while the liquid goes into your cup.

    • Photo: Colin Swift

      Colin Swift answered on 26 Jun 2013:

      Filtering is the removal of an unwanted item. I guess you could filter the particles out of muddy water to produce a clear liquid – you maight do this in Chemistry. In my field of laser safety you may want to remove the wavelength (colour) of a laser beam from your vision to remove any dangers present from the laser. Electrically you might have a signal – of a known frequency – and by filtering out frequencies other thaan this you can reduce the noise in the signal…basically removing what you don’t want and leaving what you do want….

    • Photo: Charlotte Dalton

      Charlotte Dalton answered on 26 Jun 2013:

      filtering just means separating out a solid part and a liquid part, so for example in chemistry we filter mixtures of solid chemicals and liquid ones to separate them

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