How fast laser
How fast is a laser? Thread starter edchris Start date Jul 14, I am curious as to the speed attainable on a standard Laser, with one lb crew. Thank you for the info. Wavedancer Upside down? Staff member. I love planing in my Laser who doesn't? As a lightweight lbs , I can usually get my full-rig to plane reaching in winds of about 15 mph. Perhaps even at lower wind strengths. But in all honesty, the Laser is not a fast boat by today's standards; your Hobie 16 would be faster. And GPS recorded speeds are notoriously unreliable.
For instance, there was a long discussion on Sailing Anarchy last year about a GPS equipped Albacore supposedly hitting something like 20 mph.
Without getting into the nitty gritty of how velocity is measured by a GPS device, it is relevant to define whether we are talking about instantaneous speed for instance, down a wave or speed maintained over some defined distance.
As an aside, 'official' speed records are done over a course that measures m. For instance, portions of the Boat Whisperer video from Rooster Sailing were done in mph winds, and it certainly looks like that to me. But I would be reluctant to take my boat out under those conditions because 1 I prefer not to break things and 2 I would be swimming most of the time WestCoast New Member.
A 29er doesn't do much over 20kts, and a moth much over 25kts. I have always guessed but never GPS verified a top speed of around kts. WestCoast said:. Deimos Member. You can record quite amazing speeds using a GPS. Of course these speeds do not last long as they are not real but due to position fluctuations that are part of the GPS system.
Which is why GPS's average speed over a period of time. So, it depends on how this speed was recorded under what conditions and for how long. Maybe an instantaneous speed down the back of a wave in a strong wind? More info. Kaiser Member. So, records aside, does anyone have some general numbers? I've gotta believe that someone here has taken their GPS out and recorded speeds at various points of sail on a days with different wind levels.
I'm not the original poster For instance, close hauled on a 15kt day Beyond that, is also beyond my brain reach because you would think that as long as you are on plane, the more wind the faster you go Webmuppet New Member. There's some footage of him in the 'training' section of the DVD which is him sailing in some fairly monstrous seas - it's breathtakingly fast and almost looks as he has just hit the 'hyperspace' button.
I would love to know how fast he is actually going AJL New Member. It was a nice sunny day about 28 deg C and about 26kts wind. Waves about 1m and I must have been doing well in front a decent wave at the time. AJL said:. In reality, it is merely an illusion. This method of clicking the laser beam in a certain way is one of the many ways to make it appear that a laser beam is moving faster than the speed of light. The theory of relativity by Einstein imposed a cosmic speed limit that proves there is nothing travels faster than the speed of light.
A flash of your camera results in a burst of light, which lasts for a fraction of a second. The laser beam, on the other hand, lasts longer. The average power of a laser pointer is about 0. However, while the flash of a camera disappears instantly, the laser beam lasts until a solid mass blocks it.
This is also the reason why it is illegal to point a laser beam at the sky as it could interrupt the vision of the pilot of a flying plane. Even if you can no longer see the laser beam with your naked eye, it travels fast and far in the sky. This also shows that since a laser beam travels as fast as the speed of light, the flash is not faster than a laser beam. The laser point has an average power of around 0. However, since the laser beam has a narrow path, it can easily spread out over long distances.
When the beam is meters away from the pointer, it is times wider and can appear brighter than a watt light bulb! When the laser beam is seen from an airplane flying 40, feet in the air, the beam can look as bright as the light from a quarter of the moon, if there is no smog or clouds. When using a laser pointer, the tiny spot can be seen across the room easily. If you use it outside, the beam would appear brighter and bigger. This unusual phenomenon is the result of "anomalous dispersion", an effect not seen in nature in transparent materials and is created by the non-natural thermal state of the cesium gas used in the chamber.
A pulse of light consists of many components, each at a different wavelength as can be seen when sunlight passes through a prism in "normal dispersion" and is broken down into its constituent colors.
The effect of anomalous dispersion on the wavelengths of the components of light, however, is to modify them. Anomalous dispersion causes components with a shorter wavelength in a vacuum to have a longer wavelength in the chamber and conversely, components with a longer wavelength in a vacuum have a shorter wavelength in the chamber. Unlike with normal dispersion, anomalous dispersion has the extraordinary effect of enabling a light pulse to appear again at a distant point along its direction of propagation and produce the exact shape of the light pulse that entered the chamber.
A light pulse can thus traverse the distance between two points faster than its vacuum speed. Einstein's Theory of Relativity still stands, however, because it is still correct to say that information cannot be transmitted faster than the vacuum speed of light," said Dr.
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