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Why are filters important?

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Anonymous

13y ago
Updated: 8/20/2019

What kind of filter?

Optical filter?

Gas filter?

Liquid filter?

Spam filter?

Electric filter?

Electronic filter?

Acoustic filter?

All filters serve to separate, select, reject, remove, extract or block something. Thus an optical filter allows certain frequencies or polarizations of the electromagnetic spectrum to pass while blocking others, a spam filter blocks unwanted email, and an acoustic filter removes some sound frequencies from a signal. They are important because sometimes we don't want spam, or blue light, or high frequency sounds, or whatever.

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Wiki User

13y ago

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