A refractive error is an error in the focusing of light by the eye. ... The main goal of this instrument is to determine someone's refractive error, Refractive error: is an error in the focusing of light by the eye. ... Lens refractive power: is the power of a lens to which degree it will converge or diverge rays of light originating from the same point. ... The more dioptres put into the lens the more it refracts or bends light. ... How is light diverged in different lenses? ...

• Word Count: 945
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School

The following paper is on the chapter of light reflection and refraction. ... The next section in the chapter is on the refraction of light. ... Light is refracted toward the normal when it passes to a denser medium, and light is refracted away from the normal when the light ray passes into a medium that is l;ess dense. ... The final section of the chapter is on the index of refraction and speed of light. ... That concludes the end of this report on Light Reflection and Refraction. ...

• Word Count: 500
• Approx Pages: 2
• Grade Level: High School

When the light is bending like this, it is called refraction. The different colours of the light spread out because of this refraction. The red light is bent the least and violet light the most, that's why the arch of the red light is the largest and the violet is the smallest. ... The angle of refraction is a fixed angle and will never change. The sunlight is refracted through drops of rain, which is why rainbows appear after or during rainfall. ...

• Word Count: 438
• Approx Pages: 2
• Grade Level: High School

The Equipment: Beaker Stirring Rod Water Sugar Measuring Cylinder 3 semi circular trays Pencil Large protractor Light Box We chose water as our solvent as it was cheap, readily accessible and we had the advantage of already knowing its refractive index (1.33). ... We chose a light box to generate our ray of light as we already were competent with its use and it provided an adequate accuracy. ... The Method: 1) Sketch four trays onto paper and measure an angle of incidence of 30 and 50 for each. 2) Measure 80mls of water and combine with 20mls of sugar in beaker s...

• Word Count: 923
• Approx Pages: 4
• Grade Level: High School

JOURNEY OF LIGHT Light is the most important phenomena around us .It makes us see things of this world. ... What is the nature of light? ... The phenomena of reflection and refraction was explained on the basis of elastic collision and attraction of light by dense medium particles respectively. ... The nature of light seemed to be established . ... He came up with the theory of dual nature of light. ...

• Word Count: 716
• Approx Pages: 3
• Grade Level: High School

A lens works by creating an image through the refraction of light. ... The light is refracted, or bent, through the entire lens except through this point. ... Any light that is refracted through the lens is bent toward the thickest portion of the lens. ... This spreads the light way from the center of the lens and moves the focal point forward. ... This is expressed by diopters, which is an indication of the amount of light that is bent. ...

• Word Count: 875
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School

And he himself was noting but a prism that refracted their lives. ... The thing that he is looking for is light. This ambiguous concept of light Ondaatje presents throughout the novel is not ordinary light, but one that illuminates the void of darkness. ... "And he himself was nothing but a prism that refracted their lives," (Ondaatje, pg.157) is a well-written metaphor that describes his relationship with his friends. A prism, by definition, refracts light into a spectrum of colors. ...

• Word Count: 1147
• Approx Pages: 5
• Has Bibliography
• Grade Level: High School

These telescopes captured light that was emitted from these stars in space. ... Galileo was the first astronomer to use a refracting telescope. ... They both captured the incoming light and bent it into a bright point where the viewer may see the desired object. ... Generally, solids, liquids, or dense gases emit light at all wavelengths when heated. An absorption spectrum occurs when light passes through a cold, dilute gas and atoms in the gas absorb at characteristic frequencies; since the re-emitted light is unlikely to be emitted in the same direction as the absorbed photon, this gives ...

• Word Count: 447
• Approx Pages: 2

In their first decade they made many advances by finding new explanations of heat, cold, light, a new pocket watch, and a new account of the universe. ... Since people had studied the first for a long time, they felt it was time to take a look at the second book in a new light. ... She felt that they distort or misshape things because they may never be perfect it could have a cracked lens, or the light may cause shadows or refractions. ...

• Word Count: 640
• Approx Pages: 3
• Grade Level: High School

Chiral compounds like this one interact differently with left and right circular polarized light, depending on their "handedness" Journal of Chem. ... This produces circular dichroism (the property of some crystals and solutions of absorbing one of two plane-polarized components of transmitted light more strongly than the other) and birefringence, the refraction of light in an anisotropic (exhibiting properties with different values) material in two slightly different directions to form two rays (Webster 2002). ...

• Word Count: 572
• Approx Pages: 2
• Grade Level: High School

Light waves striking the rods and cones bring about chemical changes that generate neural signals. ... Light enters the eye through the cornea, a transport protector; it's the clear bulging surface in front of the eye, and the main refractive surface of the eye. ... The iris is highly pigmented and has a remarkable ability to adjust light intake by dilating and constricting in response to light intensity and even to inner emotions. Behind the pupil is a lens that focuses the incoming rays into an image on the light sensitive back surface. ... Nearsighted vision is when the light rays f...

• Word Count: 780
• Approx Pages: 3
• Grade Level: High School

An excimer laser applies waves of ultraviolet light to reshape the corneal tissue of the eye to match the prescription from the patient's glasses or contact lenses (Spectera). ... The benefits of having LASIK laser eye surgery compared to PRK (Photo Refractive Keratectomy) are that the corneal tissue is not removed thus allowing post surgery corrections easier to perform. ... Side effects including discomfort, blurry vision, scratchiness, dryness, glare, haloes around lights, light sensitivity, and red patches on the white of the eye may result from surgery. ...

• Word Count: 603
• Approx Pages: 2
• Grade Level: Undergraduate

Our eyes are detectors, which detect visible light waves. ... There are other forms of light, which we cannot see. ... All forms of radiation travel at the speed of light. ... Hershel performed other experiments called "calourific rays" that existed beyond the red part of the spectrum and found that they were reflected, refracted, absorbed and transmitted just like normal light. Sir William has discovered a form of light beyond red light. ...

• Word Count: 708
• Approx Pages: 3
• Grade Level: High School

It depended on the phenomenon of total internal reflections, which can confine light in material surrounding by other materials with lower refractive index, such as glass in the air. In the mid 1840s, Swiss physicist Daniel Collodon and French physicist Jacques Babinet showed that light could be guided along jet of water for fountain display. British physicist John Tyndall popularized light guiding in a demonstration he first used in 1854, guiding light in a jet of water flowing from a tank. By the turn of the century, inventors realized that bent quartz rods could carry light, and patented th...

• Word Count: 864
• Approx Pages: 3
• Grade Level: Undergraduate

Pappus of Alexandria. Pappus, regarded as an important Greek mathematician, was born in Alexandria in Egypt. His interest in mathematics is said to have began from when he observed a solar eclipse on October 18, 320 and then since has focused his work on geometry. Everything associated with Pappu...

• Word Count: 647
• Approx Pages: 3
• Grade Level: Undergraduate

When heated in the air, thorium metal turnings ignite and burn with a brilliantly white light. ... Some common uses of thorium are in light bulb elements, arc-light lamps, welding electrodes and heat-resistant ceramics. ... These mantles, consisting of thorium oxide with about 1% cerium oxide and other ingredients, glow with a dazzling light when heated in a gas flame. ... Glasses containing thorium oxide have a high refractive index and a low dispersion rate, making great high quality lenses for cameras and scientific instruments. ... In conclusion, with the many different developments of...

• Word Count: 1147
• Approx Pages: 5
• Grade Level: Undergraduate

REPORT Sound Sound is any disturbance that travels through an elastic medium such as air, ground, or water to be heard by the human ear. When a body moves back and forth (vibrates), the oscillation causes a disturbance of the surrounding medium, it radiates outward in straight lines in the form o...

• Word Count: 722
• Approx Pages: 3
• Has Bibliography
• Grade Level: High School

Arthur millers " the crucible" presents an uncharacteristic tragic playwright that holds underlying meaning, which could be related to any society. Due to its verbosity It is effective in all of its three contexts- The Salem Witch Trials of spring 1692, The McCarthy "witch hunts" of the 1950's (at w...

• Word Count: 1063
• Approx Pages: 4