All waves possess the properties of reflection, refraction,
diffraction and interference. These phenomena's were observed with the
use of a ripple tank.
A ripple tank consists of a large rectangular tray with a transparent
bottom. Water is placed in this tan to a depth of approximately one
centimeter. A light source is then placed above the tray of water.
When the water is disturbed it can be seen on a white surface
positioned under the tray.
The first phenomenon observed was reflection. It was found that water
waves also follow the law of reflection.
As straight waves strike a hard straight surface they are reflected at
an angle equal to the angle of incidence. After reflection the wave
has the same speed, frequency and wavelength as it did prior to the
collision. This is similar to the reflection of circular waves off a
straight barrier. The reflected waves are also circular, however they
have a centre point that is position behind the barrier. This point is
known as the "image" of the source.
Reflection of a parabolic or concave barrier can be closely compared
to that of light waves off a concave mirror. If the incident wave was
straight, the reflected waves are curved, and they converge at a fixed
focal point. After passing through the focus, the radius of the curves
increase. The opposite is so when circular waves strike a concave
barrier. The reflected waves are then straight.
The next phenomenon observed was the refraction of water waves. The
refraction was demonstrated in the ripple tank by dividing the tank
into a deep and shallow region. This was achieved by placing a
rectangular object into one end of the tank.
When straight waves travel from a deep region of water into a shallow
region, it is found that the speed of the waves is slower in the
shallower region. Since the frequency of the wave stages the same, it
is obvious that there must be a corresponding decrease in wavelength.
If the waves pass from deep to shallow water at an angle other than
* A decrease in pebble size in the direction of long shore drift. * An increase in pebble roundness in the direction of long shore drift. I visited the two extreme ends of the beach, Gore point at the west and Hurl stone point at the east, at each end I measured: * The shape of the beach known as the beach profile, using a tape measurer and a clinometer. A clinometer measures the angle of a slope. * The size and shape of a sample of pebbles.
Christopher Benfey’s work The Great Wave is a narrative driven by a collection of accounts, stories and curious coincidences tying together The Gilded Age of New England in particular with interactions and connections to the Japan of old and new. In the context of The Great Wave, Benfey's own personal journey to Japan at the age of sixteen should be understood. Embarking on this voyage to learn traditional writing, language and Judo, his story can also be seen as a not only a historical continuation, but also a personal precursor to the vignettes he discovers and presents to the reader.
For the weekend Camille and Zaxby are taking a trip to Wavestown for a science class they have. Camille and Zaxby and so excited that they get to observe the Electro Magnetic Spectrum. The first thing they notice is a rainbow, Zaxby said “that must be visible light”, Camille agreed. They want to go and look at local stores, Camille points out that since we aren’t feeling we can go to Dr. Bob’s health store that takes x-rays of patients that need it. They think some gammma waves are going off, because clearly the Doctor’s tools need to be cleaned.
After reading Anne Tyler’s Average Waves In Unprotected Waters, a few moments in particular stuck out to me. On page 1065 of the text, Tyler writes, “People stared at him. She would have liked to push their faces in.” Here, Bet is at the train station with her disabled son, Arnold. The people round them begin to stare as Arnold begins to act out. This makes Bet understandably upset as people are being rude to her and her son by staring at and judging them.
In the piece The Fall of Water by Carole Condé and Karl Beveridge, the clashing worlds between the activists and corporate organizations is perfectly balanced through a replication of the piece Fall of Rebel Angels. Similar to the concept of angels and devils walking the Earth, each side is trying to either preserve or take water away as a natural resource. This piece addresses the politics of water waste and questions our social values. The artists use appropriation to reveal activists in the piece fighting barbarically against Dasani, Coca Cola, Perrier and other large corporations. Shockingly, the police are also seen in the bottom defending the interests and greed of these corrupt organizations. Hiding among the overload of waste, a victim
Jim Thomson an oceanographer from the University of Washington has made a remarkable correlation between waves in the Arctic Ocean and global warming. According to Thomson the increasing wave size that he documented during a storm is because of the increasing open ocean (University of Washington, 2014.). The open ocean in the Arctic a decade ago was only 100 miles, but in 2012, it was documented at more than 1000 miles (University of Washington, 2014.) With more open ocean, the normal harsh winds, and warmer temperatures it is predicted that wave sizes will increase. Currently, Thomson measured storm waves reaching sixteen feet and it can only be concluded that waves will increase in size (University of Washington, 2014.). The open ocean impacts the wave size because as wind blows across the surface the water will ripple and create white caps, which will steady double in size, and because of more open ocean the waves will keep getting bigger. This is a problem because as shipping companies look for ice-free routes they will face more stormy ocean weather, which is the leading cause of death on the ocean waterways.
A summary of the narrative “Lost in the Waves” is about a father who is maed Walt and his twelve year old autistic son named Christopher. Walt and his son, Christopher visited Ponce island in Florida. After they ate they went to the beach and then went into the waters of the atlantic ocean. When they got in the tide took them out about fifty feet in matter of seconds and they didn't think anything suspicious was going on. But, then all of sudden they were two hundred feet away from the shoreline. This is when Walt knew they were in trouble and twenty minutes later they were a mile out. As night falls, with no rescue crew coming, the dad comes to a devastating realization. That he will have to push Christopher off farther away from him. If they
Conclusion: This experiment was a good teaching for us to learn more about the sound waves, but
In life, everyone has tribulations or “waves.”It is how they ride the “wave” that determines whether they survive or not. When riding a wave, a person will either sink or swim. I agree with this quote because substandard things happen to people all the time. Sometimes, one problem hits and another one will follow up 10 times harder. Nevertheless, does that mean that when one “wave” hits that you give up? No! That means to ride the “wave” and see what happens next.
Height of sand, compression Flatten or compress the sand back to how it was, as accurately as possible, by using a flat surface. Research Question How does the height of the drop affect the depth of the sand? Hypothesis As the height of the drop for the ball increases, the measured depth of the sand will increase. This is because the ball will have more time to accelerate at 9.8ms-¹, and therefore have more momentum, creating a larger impact on the sand each time the height of the drop is raised.
In the 1990’s, Light Detection and Ranging System (LiDAR) has been introduced in Bathymetry. LiDAR uses laser to gather data. LiDAR Bathymetry Systems are either airborne or terrestrial. Today, SoNAR is preferred over LiDAR because of the unstable behavior of light in water. Light bends, reflects, and scatters in water while sound only varies in its speed and propagates along a single track without scattering. SoNAR Bathymetry Systems are more straightforward and simple than LiDAR systems because of the complexity of light over sound in water. Current studies are making use of these two systems to complement and to verify gathered data.
Refraction of Light Aim: To find a relationship between the angles of incidence and the angles of refraction by obtaining a set of readings for the angles of incidence and refraction as a light ray passes from air into perspex. Introduction: Refraction is the bending of a wave when it enters a medium where it's speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media. The amount of bending depends on the indices of refraction of the two media and is described quantitatively by Snell's Law. (Refer to diagram below)
Sound is something humans cannot see so it can be somewhat of a complicated concept. Sound is produced when something causes a vibration, which creates a sound wave that travels through the air. There are many things that can affect the way perceive sound waves. One thing that can really affect a sound wave is other sound waves. If the sound waves are out of phase, the two sound waves will destructively interfere with each other making the two waves cancel each other out.
-Some investigations on sound and light formed the starting point for his theory of interference