When we are trying to understand something‚ we sometimes rely on our senses and use reason to seek for the truth. We also use intuition to discover unknown things. As environment and culture may affect people’s way of thinking‚ people from different backgrounds may interpret things differently. People from the same background can even have different personal experiences‚ which also affect people’s understanding of the surroundings. No two people have exactly the same idea and we try to understand
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Dispersion: The speed of light is slower in various materials than it is in a vacuum or outer space. When the light passes into a material at an angle‚ the light beam is bent or refracted according to Snell’s Law and the index of refraction of the material. But also‚ the speed of light through a material varies slightly with the wavelength or frequency of the light. Thus‚ each wavelength is refracted at a slightly different angle when passing through a material at an angle. This spreading out of
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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. The law of reflection says that for specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected. Mirrors exhibit specular reflection. In acoustics‚ reflection causes echoes and is used in sonar. In geology
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dense medium in which light travels slowly (more optically dense)‚ light will refract towards the normal line. This is demonstrated by the two incident rays in the diagram above about the refraction by a converging lens. Once light refracts from the boundary and
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1. (a) Indications -The stenopaic slit refraction is useful for confirming the results of other refraction techniques for patients with irregular astigmatism or reduced visual acuity. - It is helpful for patients who have difficulty understanding the complex instructions associated with other subjective techniques. -It is important to note that‚ like the pinhole‚ the stenopaic slit may be used diagnostically to determine a patient’s potential visual acuity. -The astigmatism present in the patient’s
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8th physics light reflection refraction eyes defect and dispersion The ray of light which falls on the mirror surface is called incident ray. The point at which the incident ray strikes the mirror is called the point of incidence. The ray of light which is sent back by the mirror is called the reflected ray. The ‘normal’ is a line drawn at right angles to the mirror surface at the point of incidence. The angle between incident ray and normal is called the angle of incidence. The angle between
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. Physics Module Form 5 chapter 1 : Waves GCKL 2011 1.1 U N D E R S T A N D I N G W A V E S What is meant by a wavefront State the direction of propagation of waves in relation to wavefronts What is transverse wave? An imaginary line that joins all the points on the crest of a wave. The direction of propagation of a wave is perpendicular to its wavefront. A transverse wave is a wave in which particles of the medium oscillate in the direction of the propagation of the waves. Water
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There are two main aspects that influence a rainbow‚ and these include the altitude of the sun and the size of the raindrops (The Rainbow). The sunlight is refracted‚ which means the bending of light as it passes from one medium to another. This refraction makes different wavelengths‚ or colors‚ of the white light from the sun to separate. Determining whether or not the wavelengths will go through the raindrops or reflect always depends on the angle that
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Refraction and Snell’s Law When an ultrasonic wave passes through an interface between two materials at an oblique angle‚ and the materials have different indices of refraction‚ both reflected and refracted waves are produced. This also occurs with light‚ which is why objects seen across an interface appear to be shifted relative to where they really are. For example‚ if you look straight down at an object at the bottom of a glass of water‚ it looks closer than it really is. A good way
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Class 10th Science Syllabus COURSE STRUCTURE CLASS X First Term: Marks: 90 Units Marks I. Chemical Substances: 33 II. World of living : 21 III. Effects of Current : 29 IV Natural Resources : 07 Total :90 Theme: Materials (30 Periods) Unit: Chemical Substances - Nature and Behavior Chemical reactions: Chemical Equation‚ Balanced chemical equation‚ implications of a balanced chemical equation‚ types of chemical reactions: Combinations‚ decomposition
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