Paper
The aim of this experiment is to measure the speed of light in an experiment available to do at school. The principle is quite simple. Let a ray of light strike a rotating mirror that reflects the light three meters away to a second mirror, so that the light is reflected back at the rotating mirror and back to the laser. The rotating mirror has during the time it took for the light to travel the six meters to the second mirror and back rotated some degrees and the light spot has moved from the origin. And if you know how fast the mirror is rotating, you can calculate how fast the light is traveling. The apparatus is set up like the figure below shows. When we did the experiment and measured, x was measured to approximately 3.0 mm – 3.5 mm. So we know that the velocity of light is the distance it travels divided by the time it takes ( c = d / t ), and the distance is 30 meters since the light should travel to the second mirror and back. The how do we know how long time it takes? Well, if we use a tuning fork we can set the mirror to do 512 rotations per second. And since we know the distance between the rotating mirror and the laser, and the angular velocity of the rotating mirror, we can calculate how long time it takes. So q = x / 10 = 3 E-4T = 1 / 512 ” 0.001953 t = q / 2p * T = ( 0.3E-4 m / 2p ) * ( 1 / 512 ) = 9.32E-8 Then, c = d / t = 30 / 9.32E-8 ” 321719678 m/s ” 322 000 km/s When we are measuring these small distances with a ruler, and using such high velocities as the speed of light, it is very hard to be precise and the result may vary quite much. According to the book the velocity of light is 299,792,458 m/s, so it wasn’t that bad measured, but on the other hand, the difference is approximately 22,000km/s which is a very high velocity.
Другие работы по теме:
Light Matter Essay Research Paper Inner LightIn
Light Matter Essay, Research Paper Inner Light In order to understand what light is one has to understand how vision works. The process of visual perception is incredibly complex, involving many functions of the brain. In Arthur Zajonc’s book “Catching the Light,” he writes, “?vision requires far more than a functioning physical organ.
Pysch Essay Research Paper Research Methods is
Pysch Essay, Research Paper Research Methods- is when you make and test prediction of the relations between variables. Its the study of behaviour. Variables is any condition, event, characteristic or behaviour.
The Star Essay Research Paper In Great
The Star Essay, Research Paper In Great Expectations, by Charles Dickens, light is used symbolically through the example of Estella. Miss Havisham brings Estella up in the darkness, consequently sheltering her from the true
September 11 Essay Research Paper During the
September 11 Essay, Research Paper During the summer of tenth grade, I took a number theory course at Johns Hopkins University with students from Alaska, California, and Bogota, Colombia. My attendance of the New Jersey Governor’s School in the Sciences is another accomplishment that exemplifies my dedication to knowledge.
Black Holes Essay Research Paper In our
Black Holes Essay, Research Paper In our galaxy, there are millions of stars. In our universe, there are millions of galaxies. Humans have known about stars since the beginning of our existence. What we think of these mysterious things have changed over time. Even in periods as short as a lifetime our ideas have changed.
Problems With Measurements Of The Distance Of
Stars Essay, Research Paper This is one of the most commonly asked questions and deserves an honest answer. Below is first a short answer then a more thorough answer. There are three things we need
Poem Essay Research Paper I went to
Poem Essay, Research Paper I went to bed last night Wishing on a star Your light shines in my heart No matter where you are It’s hard for me to say My words are sometimes few
Momentum And Collisions Essay Research Paper This
Momentum And Collisions Essay, Research Paper This report will investigate the theoretical velocity of a ball bearing gun. The methods and techniques used to derive the results will be shown along with the
IQ Test Essay Research Paper Why IQ
I.Q Test Essay, Research Paper Why IQ tests don’t test intelligence The task of trying to quantify a person s intelligence has been a goal of psychologists since before the beginning of this century. The
Sir Issac Newton Essay Research Paper Isaac
Sir Issac Newton Essay, Research Paper Isaac Newton Newton was born on the 25th December 1642 and died in 1727. He was born In Woolsthorpe in Lincolnshire. His father was a farmer but he died
Black Holes Essay Research Paper Our universe
Black Holes Essay, Research Paper Our universe is a vast abyss, always expanding without any end. Many objects in space are exciting and interesting. One great mystery is the black hole. Ever
Black Holes Essay Research Paper Within our
Black Holes Essay, Research Paper Within our galaxy alone, there are millions upon millions of stars. Within our universe, there are millions upon millions of galaxies. Humans have known the existence of stars since they have had eyes. Although interpretations may have differed on what they were, they were always thought of as white glowing specks in the sky, but the mystery does not lie within what we can see, but what we can not see.
Tape Measure Essay Research Paper MEMORANDUMDate June
Tape Measure Essay, Research Paper MEMORANDUM Date: June 20, 2000 From: TAPE MEASURE The tape measure is an instrument used to measure objects. Tape measures are found in most households and are fairly simple to use. Standard tape measures measure in feet and inches.
Velocity Essay Research Paper Instantaneous Versus Average
Velocity Essay, Research Paper Instantaneous Versus Average Velocity A position versus time graph or a displacement versus time graph can be used to analyze the motion of an object in one dimension. The slope gives the object’s velocity. The slope of a line segment joining two points on the graph gives the average velociy during that interval.
Momentum Essay Research Paper AbstractMeasurements of velocity
Momentum Essay, Research Paper Abstract Measurements of velocity and mass of two objects colliding, support the conservation of linear momentum. The dynamics of different masses distinguish velocity values experimentally. Video recordings of two colliding masses can be manipulated to extract frames displaying distance verses time.
Terminal Velocity Essay Research Paper SC1 Investigating
Terminal Velocity Essay, Research Paper SC1: Investigating Terminal Velocity Introduction When an object falls through a fluid it accelerates until it reaches its terminal velocity. At this speed the forces acting on it are balanced.
Aquifer Essay Research Paper The aquifer that
Aquifer Essay, Research Paper The aquifer that can be found in the cross section A-B is a confined aquifer. It has and upper confining layer of dense black shale, with a thickness of 61 meters. The lower confining layer is composed of dense gray shale and has a thickness of 3 meters. The aquifers itself is a layered heterogeneity measuring 40 meters in thickness.
Measurement Of FreeFall Acceleration Essay Research Paper
Measurement of Free-Fall Acceleration Introduction Galileo Galilei (1564-1642), the man first accredited with the correct notion of free-fall with uniform acceleration, stated that “if one were to remove entirely the resistance of the medium, all materials would descend with equal speed.” Today, this statement holds true for all objects in free-fall near the Earth s surface.
Imagery Trace Light Dark Essay Research Paper
Throughout The Children of Men, there were various significant images, one of which was light/dark contrast. James used light/dark contrast throughout the entire book to set the scene and to outline important events. The light was used to show peace, especially with the females that Theo was attached to.
Pushing An Object Essay Research Paper Pushing
Pushing An Object Essay, Research Paper Pushing an object When an object with mass is moving, that it has kinetic energy is well known. Energy quantity can be expressed in two parameters of the mass and the speed. Generally definition of energy is difficult, though the quantity can be measured easily.
Electronics Logic Probe Essay Research Paper LOGIC
Electronics- Logic Probe Essay, Research Paper LOGIC PROBE SUMMARY Logic Probe is one of the basic troubleshooting tools for common electronic logic circuits (TTL circuits). Almost all video game circuit boards are built using TTL chips. These chips will occasionally fail and the Logic Probe is a tool that affords us a look into what may be failing, and it s a very handy measuring device used to determine output logic levels.
Black Holes Essay Research Paper Black HolesThere
Black Holes Essay, Research Paper Black Holes There are many strange and wonderful phenomenons being discovered throughout our Universe. One of the most intriguing is the concept of a black hole in space. Astronomers have discovered a black hole just 1,600 light years away from Earth. The National Radio Astronomy Observatory cataloged this black hole in the constellation Sagittari on a star called V4641.
Poem Your Touch Essay Research Paper The
Poem: Your Touch Essay, Research Paper The sparkle in your eyes reminds me of the light in your soul To see the brightness of your smile is my ultimate goal The touch of your hand
Physics Of Fly Fishing Current Event Essay
, Research Paper The Physics of Fly-fishin What does it take to launch an ultra-light fishing line over 200 feet? A little physics and a lot of feel for the fishing rod, that s what. The trick to doing good is to have the thinner, end of the line, land on the water first then the fly. The end of the line cushions the fly, having the effect that a fly is landing on the water, not a piece of nylon string.
Albert Einstein And The Theory Of Relativity
Essay, Research Paper Albert Einstein was known for The Theory of Relativity (E = mc^2) which in based on twoprinciples:I. Principle of Special Relativity- All inertial observers are equivalent.II. Constancy of Velocity of light- The velocity of light is the same in all inertial systems. Albert Einstein was born on March 14th in Ulm, Germany.
Measuring Atmospheric Pressure Essay Research Paper Measuring
Measuring Atmospheric Pressure Essay, Research Paper Measuring Atmospheric PressureAim: To measure the atmospheric pressure in Jonkoping today, by a simple lab. Apparatus: One plastic hose. Water (colored with MnO4-). A bucket.Procedure: First, we filled a bucket and the hose with the colored water.
Black Holes Essay Research Paper BLACK HOLESMike
Black Holes Essay, Research Paper BLACK HOLES Mike Carey Scientists have been trying to determine if black holes (earlier known as `frozen stars ) truly do exist for several decades now. Thanks to the great Albert Einstein and his