From a Ripple to a Wave

Refers to person, place, thing, quality, etc. From a Ripple to a Wave sat on the shore, looking at the ripples on the surface of the lake. Simon si sedette sulla riva, guardando le increspature sulla superficie del lago.

Verb not taking a direct object–for example, “She jokes. The water rippled as the boat moved through it. L’acqua si increspò mentre la barca si muoveva. When the mayor mounted the stage, a ripple of murmurs broke out in the room. Quando il sindaco salì sul palco, nella stanza si sentì un mormorio di conversazioni. Bethan’s hair fell down her back in ripples.

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I capelli di Bethan le ricadevano in onde sulla schiena. The news rippled through the village. Le notizie correvano per il villaggio. When one person applauds and everyone else joins in, that’s the ripple effect at work. Quando una persona applaude e tutti gli altri la imitano, entra in azione l’effetto domino. Quando una persona applaude e tutti gli altri la imitano, entra in azione una reazione a catena.

From a Ripple to a Wave

Vedi la traduzione automatica di Google Translate di ‘ripple’. My first thought is that I have seen the devil. Whatever You Do Someone Will Die. Transitive sense “cause to ripple” is from 1786. Meaning “mark or movement suggestive of a ripple” is from 1843. Enter the characters you see below Sorry, we just need to make sure you’re not a robot. Enter the characters you see below Sorry, we just need to make sure you’re not a robot.

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This article may require cleanup to meet Wikipedia’s quality standards. No cleanup reason has been specified. In physics and engineering, a ripple tank is a shallow glass tank of water used in schools and colleges to demonstrate the basic properties of waves. It is a specialized form of a wave tank. Ripples may be generated by a piece of wood that is suspended above the tank on elastic bands so that it is just touching the surface.

Screwed to wood is a motor that has an off centre weight attached to the axle. As the axle rotates the motor wobbles, shaking the wood and generating ripples. A number of wave properties can be demonstrated with a ripple tank. These include plane waves, reflection, refraction, interference and diffraction. When the rippler is attached with a point spherical ball and lowered so that it just touches the surface of the water, circular waves will be produced.

When the rippler is lowered so that it just touches the surface of the water, plane waves will be produced. By placing a metal bar in the tank and tapping the wooden bar a pulse of three of four ripples can be sent towards the metal bar. The ripples reflect from the bar. If the bar is placed at an angle to the wavefront the reflected waves can be seen to obey the law of reflection.

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The angle of incidence and angle of reflection will be the same. If a concave parabolic obstacle is used, a plane wave pulse will converge on a point after reflection. This point is the focal point of the mirror. Circular waves can be produced by dropping a single drop of water into the ripple tank. If this is done at the focal point of the “mirror” plane waves will be reflected back. If a sheet of glass is placed in the tank, the depth of water in the tank will be shallower over the glass than elsewhere.

The speed of a wave in water depends on the depth, so the ripples slow down as they pass over the glass. This causes the wavelength to decrease. If the junction between the deep and shallow water is at an angle to the wavefront, the waves will refract. In practice, showing refraction with a ripple tank is quite tricky to do. The sheet of glass needs to be quite thick, with the water over it as shallow as possible. This maximizes the depth difference and so causes a greater velocity difference and therefore greater angle.

If the water is too shallow, viscous drag effects cause the ripples to disappear very quickly. The glass should have smooth edges to minimise reflections at the edge. If a small obstacle is placed in the path of the ripples, and a slow frequency is used, there is no shadow area as the ripples refract around it, as shown below on the left. A faster frequency may result in a shadow, as shown below on the right.

If a large obstacle is placed in the tank, a shadow area will probably be observed. If an obstacle with a small gap is placed in the tank the ripples emerge in an almost semicircular pattern. If the gap is large however, the diffraction is much more limited. Small, in this context, means that the size of the obstacle is comparable to the wavelength of the ripples. A phenomenon identical to the x-ray diffraction of x-rays from an atomic crystal lattice can also be seen, thus demonstrating the principles of crystallography.

Interference can be produced by the use of two dippers that are attached to the main ripple bar. In the diagrams below on the left the light areas represent crests of waves, the black areas represent troughs. Notice the grey areas: they are areas of destructive interference where the waves from the two sources cancel one another out. To the right is a photograph of two-point interference generated in a circular ripple tank.

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It demonstrates the wave principles behind slit diffraction, zone plates, and holograms. To get started with the applet, just go through the items in the Setup menu in the upper right. Also see the Ripple Tank applet. All around us, can’t you see? Thanks to MDUVAL for correcting these lyrics. Sting lyrics are property and copyright of their owners.

Love Is The Seventh Wave” lyrics provided for educational purposes and personal use only. Wave ripple or symmetric ripple, from Permian rocks in Nomgon, Mongolia. Note “decapatation” of ripple crests due to change in current. While wave-formed ripples are traditionally described as symmetrical, asymmetric wave ripples are common in shallow waters along sandy shores.

They are produced by bottom oscillations generated by passing breaker waves, which have unequal intensity in opposite directions. Wave-formed ripples indicate an environment with weak currents where water motion is dominated by wave oscillations. Although symmetrical ripples are also called bi-directional ripples there is a difference between them. Bi-directional ripples are rarely symmetrical due to the difference in force of the two directions, where as the wave formed or oscillation ripples form from the circular water movement pattern of water molecules.

These ripples form parallel to the shore line. They usually display rounded troughs and rounded crests. Ripples are relatively small, elongated ridges that form on bed surfaces perpendicular to current flow. With continuous current flow in one direction, asymmetrical ripples form.

Asymmetrical ripples contain a steeper slope downstream. With an alternation in current flow from one direction to the opposite symmetrical ripples form. Symmetrical ripples tend to have the same slope on both sides of the crest. Symmetrical ripples form as water molecules oscillate in small circles. A particle of water within a wave does not move with the wave but rather it moves in a small circle between the wave crest and wave trough. This movement of water molecules is the same for all water molecules effected by the wave.

Wikimedia Commons has media related to Ripple marks. The Changing Earth: Exploring Geology and Evolution, 2nd ed. 1997, Sea-floor geology of a part of Mamala Bay, Hawaii: Pacific Science, v. Chapter 7: A Surface Veneer: Sediments, Soils and Sedimentary Rocks. Thank you so much for visiting me in the Attic, it’s lovely to see you. My name is Lucy and I’m a happily married Mum with three children.


We live in a cosy terraced house on the edge of the Yorkshire Dales in England which we are slowly renovating and making home. I love crocheting this pattern, its relatively simple, rhythmic and soothing, but playing with colours in this way is also energising, exciting and a lot of fun. Well to me it is any road. I can see myself coming back to time after time. But I persevered and eventually I cracked it. And I have so wanted to write a tutorial for a ripple pattern that would be easy to understand for beginners and would eliminate certain niggles. So what I’ve done here for you is to write my own pattern.

I have to be clear about this for obvious copyright reasons that I have not copied this pattern from anywhere. It has been inspired by the one in Jane Eatons book, but it is truly my own. To start out, you need to crochet your foundation chain. It should be in multiples of 14, plus an extra 3 added on for turning. I would strongly advise before you begin any ripply project to make a small ripple sample so that you’re confident of the pattern. I’m doing here, which will give you a good idea of how it forms.

See in the above pic I’ve stuck my needle in there so you can see where to gocan you see the four chains? For beginners new to crochet, working the first row into a foundation chain can seem incredibly hard at first. I know, because I can so well remember almost giving up when faced with this task. If you look at the above photo, I’ve stuck my needle in to show you where the next stitch will goit helps if you twist the chain towards you slightly, so that you are looking down on the side of it rather than the top of it. Ok, back to the patternyou should have just made 1 tr into the 4th chain from the hook.

This is where you work 2 incomplete tr’s, joining them into 1 stitch at the finish. Yarn over, draw through all three loops. You have now worked what I call the “valley”, with the 4tr’s making the sides and the tr2tog’s making the valley bottom. Now time to make the “mountain”. And again, work 2 more tr’s into the next chain. These four stitches make the top of the “mountain”, can you see in the above picture, the way it makes a V when 2 stitches are worked out of one?

I find it really helps when working a ripple pattern to be able to recognise what the decrease and increase stitches look like. Because when you are working this pattern it’s sometimes veeeeeery useful to be able to look back over the row you’ve just made and see how the pattern has formed, to check for mistakes etc. OK, after your two lots of 2tr increases on the mountain you need to make 1 tr crochet into each of the next 4 chains. Then make 1 tr crochet into each of the next 4 chains.

And finally, if you’ve done it right, you should have 1 chain left at the end of your foundation chain. Make 2 tr’s into this last chain to end the row. I’ve drawn a little diagram above there, underneath the first row so you can get a feel for the pattern visually, to see how the ripples are formed. Make a tr crochet stitch in the SAME stitchsee where I’ve stuck my needle to show you where to go? Make a treble stitch into each of next 4 stitches. If you started out with 31 stitches, you should have reached the end of the row now, as pictured above. You now need to make 2 tr’s into the top of the chain-3 from the previous row.

See in the above pic where I’ve stuck my needle to show you where to go? This chain can often be quite tight, you may have to work hard to wiggle your hook into that little hole. There, can you see the V of the last 2tr’s in that row on the left there? Now fasten off and turn the work round to join in a new colour. Joining a new colour is easysimply knot the two yarns together as close to the stitches as you can.

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Insert your hook through the first stitch, yarn over the new colour and pull it through to the front ready to begin. All rows from now on will be the same. Chain 3, then make 1 tr into the same stitch, as pictured above. 2 tr into the top chain of the chain-3 from previous row. Are you full of Ripplesome Ripply Joy?

Got enough yarn to now make a longer chain, to start a Neat Ripple cushion, a blanket perhaps? And in case you wish to print out some Compact Instructions to pop into your yarn basket, I’m writing out a more condensed Patterny version just for you. YO, draw through all 3 loops. To begin, chain multiples of 14, plus 3 for turning. 2 tr into last chain, turn. Repeat row 2 for length required. And let me know how you get on.

Mission & Goals[edit]

All my tutorials are created for you to use and enjoy for free. Could you please tell me what size crocheting hook to use. I have started a ripple blanket using your pattern but I have lost the crochet hook. Actually many native cultures around the world don’t distinguish betweeblue and green in their languages, they use the same word for both colors. Thank you for the easy to follow instructions. Hi, could you please contact me regarding this pattern?

Ty Karen for finding this patten. Its basically what im using but i have an edged ripple. I’ve reached the end of the row I have 3 chains left not 1? Have gone back and checked my chains, definitely 143, checked my work, no mistakes So why do I have 2 extra chains? Please let me explain more thoroughly in an email!

Screenshots & Other Imagery

Would you be so kind to write me a short message on the email address that I have provided by posting this comment? I noticed in the utube video it was 12 plus three is there a reason for the different cast on? Is it possible to print just the pattern without the tutorial? It would really be nice if more people used “print” symbol and somehow offered just the pattern. That requires a lot of paper to print when all that is really wanted is the pattern.

This is a lovely simple pattern but the bright cheerful colors really are impressively happy to look at. All your wonderfully bright projects are enjoyable to see without necessarily actually crocheting anything! But I do love to crochet and bright colors are my favorites. I just want to thank you for this pattern. I can’t sit and watch TV or listen to music while I crochet, because I have always been so bad at being able to find and fix mistakes and identifying stitches, etc, so I have to solely focus on what I’m making. Your pattern is so easy to follow, and the fact that there’s only one row to remember makes it so much easier for me to keep track. I started working up a sample and only had to reference the repeat pattern one time after I got to the first repeat.