1 : an instance of reflecting especially : the return of light or sound waves from a surface. 2 : the production of an image by or as if by a mirror.

The theme for the 2020-2021 program year is I Matter Because…. Students submit their completed works of art in one or all of the available arts categories: Dance Choreography, Film Production, Literature, Music Composition, Photography, Visual Arts. Thank you for let us know that you’re participating in Reflections!

From Wikipedia, the free encyclopedia. Reflective writing is an analytical practice in which the writer describes a real or imaginary scene, event, interaction, passing thought, or memory and adds a personal reflection on its meaning.

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. Mirrors exhibit specular reflection.

The reflection of light can be roughly categorized into two types of reflection. Specular reflection is defined as light reflected from a smooth surface at a definite angle, whereas diffuse reflection is produced by rough surfaces that tend to reflect light in all directions (as illustrated in Figure 3).

Four Modes of Thinking. To understand the complexity of reflection, consider the four modes of thinking Grimmett proposed: technological, situational, deliberate, and dialectical (Danielson, 1992; Grimmett, Erickson, Mackinnon, & Riecken, 1990).

Fermat’s principle, also known as the principle of least time, is the link between ray optics and wave optics. In its original “strong” form, Fermat’s principle states that the path taken by a ray between two given points is the path that can be traversed in the least time.

Whether it is traveling through air, water, glass, diamond, a smoky Broadway stage, or any other transparent substance (or in nothing — the vacuum of space), light travels in a straight path until it encounters a different medium. So straight that analogies fail — the path of light is the Ultimate Straight Line.

Light moves slower through denser media because more particles get in its way. Each time the light bumps into a particle of the medium, the light gets absorbed which causes the particle to vibrate a little and then the light gets re-emitted.

Light travels at approximately 300,000 kilometers per second in a vacuum, which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water (refractive index of 1.3; see Figure 2) and 200,000 kilometers per second in glass (refractive index of 1.5).

A denser medium provides more matter from which the light can scatter, so light will travel more slowly in a dense medium. A slower speed means a higher index of refraction, so n2 > n1, as indicated in the image on the left.

Yes. Light is slowed down in transparent media such as air, water and glass. The ratio by which it is slowed is called the refractive index of the medium and is usually greater than one.

The speed of light is normally about 186,000 miles per second, or fast enough to go around the world seven times in the wink of eye. Scientists succeeded in slowing it down to 38 mph. They did this by shooting a laser through extremely cold sodium atoms, which worked like “optical molasses” to slow the light down.

The speed of light is constant when it is in a vacuum. It travels an astounding 186,000 miles per second. However, it does slow down when traveling through other common substances such as water (140,000 mi/sec), glass (124,000 mi/sec), and diamond (77,500 mi/sec).

Scientists slow down the speed of light travelling through air. Scientists have long known that the speed of light can be slowed slightly as it travels through materials such as water or glass.

0 speed

The work demonstrates that, after passing the light beam through a mask, photons move more slowly through space. This finding shows unambiguously that the propagation of light can be slowed below the commonly accepted figure of metres per second, even when travelling in air or vacuum.

miles per hour

Explain that unlike sound, light waves travel fastest through a vacuum and air, and slower through other materials such as glass or water.

Light is not visible in a vacuum. If we see lighten up surroundings, they are glowing concentration of molecules that we see. Light itself is not visible.

In the vacuum of space, there are no (or very, very few) particles to vibrate, so sound cannot travel through this medium. Radio waves travel perfectly fine through a vacuum because they are a type of electromagnetic wave (light), and electromagnetic waves do not need a medium to travel through.

If there were no objects to absorb light, it would keep traveling forever. Light is made up of particles called photons that travel like waves. Unless they interact with other particles (objects), there is nothing to stop them. If it is infinite, the light would travel forever.

1. The Big Bang itself expanded much faster than the speed of light. But this only means that “nothing can go faster than light.” Since nothing is just empty space or vacuum, it can expand faster than light speed since no material object is breaking the light barrier.

Laser beams travel at the speed of light, more than 670 million miles per hour, making them the fastest thing in the universe.