Enter word or words combination in one of the supported languages

How to pronounce "frequencies"

Matches found: 2 (12 ms)

could generate signals at radio or optical frequencies

ted-talks_468_JillTarter_2009-320k

Duration: 5s Details

the bottom edge can only be made with a combination of various frequencies of light. As you can

117 - Why Isn't The Sky Purple

Duration: 6s Details