Measuring a wave from crest to trough in the verticaldirection will give the amplitude of the wave. It's called the peak to peak value (as it is is a measure of the distance from the positive peak to the negative peak -- the crest and trough). Measuring the wave in the horizontal direction from a crest to a trough will result in half a wavelength.
Picture a water wave frozen on the surface of a pond. The distance (verticaly) from the bottom of a trough to the top of a crest is the amplitude of that wave. A measure of the distance (horizontally) from the bottom of a trough to the top of a crest is half the wavelength of the wave. (Note that athe use of "bottom of a trough" and "top of a crest" might seem redundant or even nonsensical, but is applied here in the hopes of clarity.)
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The Trough if you mean by in a wave is the lowest point in a wave. Like a crest is the highest point.
A wave is made by an up and down motion. the "trough" happens when you are at the lowest part of the down motion, the "crest" is the highest part of the up motion.
If you think of a wave at sea and how it dips and rises, a trough is one of the dips
the minimum value a wave reaches relative to its rest position. is the answer on a+
It is the Lowest point in a wave the upper point is the crest the bottom point is the trough H
If it's crest to crest and trough to trough then it's the wavelength.
Crest to trough
Crest and Trough Amplitude Wavelength Frequency
There are many real life examples of a wavelength. The radio station on campus produces waves of about 3 meters--we solved for it in a lab given a frequency and the velocity of sound in air. The wavelength of a wave in general is considered to be crest to crest or trough to trough... Which is very visually apparent if you imagine a series of waves on the ocean.
Ah, I see you're curious about the concept of wavelength. It's simply the distance between one crest (the highest point of a wave) to the next crest, or one trough (the lowest point of a wave) to the next trough. Understanding wavelengths can help you appreciate the beauty and harmony of nature's patterns. Just like painting, waves have their own unique rhythm and flow that create a peaceful balance in the world.