wavelength
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
The distance between one point on a wave and the same point on the next wave.
Usage notes
"On the same wavelength" is a common idiom meaning two people think in a similar way.
Test yourself
Which word fits the gap? "Red light has a longer _____ than blue light."
Answer: wavelength
In your own words, what does "wavelength" mean?
The distance between one point on a wave and the same point on the next wave.
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