Also velocity of the light in a medium is inversely proportional to the refractive index of that medium. If the refractive index increases, then velocity of the light decreases. Reflection happens when light is returned back from the surface it hits. Incoming and reflected lights have the same angle as the surface. If the surface reflects most of the light then we call such surfaces as mirrors reflective.
Liam Stephenson controlled assessment Introduction In my course work I will be looking at how the thickness of a converging lens affects the focal length. The factors involved in this experiment are: light, lens curvature, refraction and thickness of the lens, these will determine the focal length; the focal length is the length between the focus and the lens. Light-visible light is an electromagnetic wave in the electromagnetic spectrum The speed of light depending on the medium it is in, for example the speed of light is 300,000 km/s however when light travels through other medium such as water or glass the speed of light is slowed this is because water and glass is denser than a vacuum of air. Due to it being more dense and a change in speed, the direction of the wave will change this is
Revision for Unit 5 Optics Definitions 1. Absorb: Is the process where light energy is taken in the object and converted to thermal energy. 2. Transmit: Is the process where light rays (or energy) go through the object and out of the other side. 3.
The factors that affect the alignment and/or mating of the optical fibers are referred to as extrinsic factors. The third is Core diameter mismatch which occurs when there is a difference in the core diameters of the two optical fibers. A core diameter mismatch loss results when the core diameter of the transmitting optical fiber is greater than the core diameter of the receiving optical fiber. A loss occurs when light at the outer edge of the transmitting optical fiber core falls outside the diameter of the receiving optical fiber core. This light is lost in the cladding of the receiving optical fiber.
Unit 7 Assignment 1 Refraction, Reflection and Optics Refraction The most common real life example used when discussing refraction is a straw in water. When a straw is placed in a glass of water and viewed from the side, it appears to be broken or bent. This is due to the difference in the refractive indices of air and water. Since water is denser than air, the straw appears to bend as the light it reflects is slowed by the density of the water. This phenomenon also makes submerged objects, such as fish look closer to the surface than they actually are.
This causes the conduction band in the source and the valence band in the channel to overlap, opening up a tunneling window. This allows band-to-band tunneling to occur laterally (parallel to the gate dielectric interface) from source to channel. Since the tunneling mechanism isn’t controlled by the flow of carriers over a barrier, TFETs should be able to switch with a much smaller voltage swing than that required in a MOSFET. Voltage is applied only to create or remove an overlap, crossing and uncrossing the bands. There are two regions of operation for a TFET: (1) Tunneling
It looks as if the oil has placed a thick line of film on the water 3 After pouring the vinegar in the water the only change I noticed was that the water seemed to be a shade darker when added it. The water looks like it is clouded some. Other than the smell a person would not be able to tell there has
A flicker paradigm occurs when an original and a modified image continually alternate, one after the other, with a brief blank field between the two. This study consisted of measuring reaction time based on presenting a flashing stimulus then either changing the stimulus with one of the independent variables; with a color-presence- location change or placement change, centrally versus marginally. The study also consisted of measuring whether reaction time was quicker or slower based on these changes occurring centrally or marginally. Based on the idea that visual acuity is good only in small area straight ahead, where the image is focused on a part of the retina called the fovea (St. James, Schneider, & Eschman, 2005), I predicted that reaction time would be quicker when the change was located centrally within the
5. What are point and shoot cameras? How do they differ from SLR cameras? Point and shoot cameras are different than SLR cameras because of the mirrors they have. An SLR camera has a semiautomatic mirror, while a point and shoot camera has an optical viewfinder.