Reflection and refraction of light from metasurfaces with phase discontinuities article pdf available in journal of nanophotonics 61. On the flip side, refraction is when light is absorbed by the medium but the direction and speed is affected. The incident ray makes an angle of 900 with the surface. Prism and rainbow formation are the examples of refraction of light. Refraction is when the speed and direction of light changes, as light moves from one. Refraction takes place when light passes from air to glass or from glass into air. Refraction is defined as bending of light wave when it passes from one medium to other. In a handson way, students explore lights properties of absorption, reflection, transmission and refraction through various experimental stations within the classroom. Refraction of light is the most commonly observed phenomenon, but other. The bending of light when it goes from one medium to another obliquely is called refraction of light.
Indirect sources, for example a hand, merely scatter the light. Cbse chapter wise practice papers with solution for class 10 science chapter 10 light reflection and refraction for free download in pdf format. Refraction takes place when light passes from air to water or from. A ray is equivalent to a very narrow beam of light, and it. Important questions, guess papers, most expected questions and best questions from 10th science chapter light reflection and refraction have cbse chapter wise important questions with solution for free download in pdf format. A wave front is the line not necessarily straight or surface connecting. Following are the rules for getting the direction of bending of a ray of light. During the course of analyzing our data, we calculated the index of refraction for the plastic lens and thereby the speed of light in the plastic.
When light travels obliquely from one transparent medium into another it gets bent. The scattered light goes off in many different directions, and may be scattered again and again before it is finally absorbed. Light laws of refraction the incident ray, the refracted ray and the normal at the point of incidence all lie in the same plane. This scattering is caused by the interaction of light with small particles, even atoms or molecules, within the material. In this equation c is the speed of light in vacuum and is equal to 3. The law of reflection states that the angle of incident ray equals the angle of the reflected ray, or. Refraction 2 of 3 light ray going from air to glass then back to air duration. Total internal reflection occurs when the angle of refraction is equal to or greater than 90 o total internal reflection is important for optical communications. Cbse test papers class 10 science light reflection and refraction. When light falls on a highly polished surface like a mirror most of the light is sent back into the same medium. State the laws of reflection and refraction, describe examples and apply the laws to. All refraction of light and reflection occurs at an interface. Free pdf download of cbse class 10 science chapter 10 light reflection and refraction multiple choice questions with answers.
Total internal reflection if the angle of incidence is larger than this, no transmission occurs. Reflection and refraction are two different properties of light. Reflection and refraction 17 be scattered away from its original direction figure 2. When electromagnetic radiation, in the form of visible light, travels from one substance or medium into another, the light waves may undergo a phenomenon. Reflection and refraction of light physics courses. To understand absorption, reflection and transmission, they shine flashlights on a number of provided objects. Knowing the difference between reflection and refraction will help you understand basic phenomenon of science.
Materials transparent to light are called optical mate rials. When a light ray moves from one optical material into another its speed will usually be altered causing. Reflection and refraction of light lecture youtube. An understanding of the fundamental properties of light. Important questions class 10 science light reflection and. This bending of light is called refraction of light. A ray is a thin beam of light that travels in a straight line.
A ray of light is incident on a concave continue reading light reflection and refraction hots for class x. Refraction of light simone zuccher february 4, 20 contents 1 the physical phenomenon 1 2 laws of refraction 2 3 visible light wavelength dispersion 3 4 critical angle and total internal re. A line drawn in the direction of propagation of light is called a ray of light. Where is the image formed in a convex mirror, when the object is anywhere in front of it. List four properties of the image formed by a plane mirror. The amount of bending of light depends upon the change in speed of light and the angle at which the light ray falls on the surface. If the object is placed between f and c, the image is real, inverted and magnified. Electromagnetic waves are ultimately produced by an accelerating charge. Cause of refraction is change in speed of light while entering a different medium. Notes physics module 6 reflection and refraction of light optics and optical instruments 190 zthe ray of light parallel to the principal axis, on reflection, passes through the focus. It is formed at the same distance behind the mirror as the object is in front of the mirror. The reflection and refraction of light introduction a transparent material is characterized by its refractive index, n, where. We shall try to understand in this chapter the reflection of light by spherical mirrors and refraction of light and their application in real life situations.
If the object is placed at a distance greater than c from the mirror, the image is real, inverted and reduced in size. R the law of refraction snells law relates how a ray of light will behave when passing from one media to the other. The best app for cbse students now provides light reflection and refraction class 10 notes latest chapter wise notes for quick preparation of cbse board exams and school based annual examinations. The light may be reflected back from the surface, transmitted through the material in which case it will deviate from its initial direction, a process known as refraction or absorbed by the material if it is not transparent at the. To understand refraction, students create indoor rainbows. A real image is one where light is actually passing through the image it can be projected onto a screen. It is natural to treat the propagation of light in terms of rays. Light refraction of light complete these ray diagrams.
Direct sources, for example light bulbs, produce the light. Refraction and reflection of plane waves using huygenss. A group of rays of light emitted by a source of light is called a beam of light. A person uses concave mirror for shaving, where should he position his face in front of it. Laws of reflection states that the angle of incidence is equal to the angle of reflection. As shown below, an electromagnetic wave is a transverse wave consisting of mutually perpendicular oscillating electric and magnetic fields. The basic difference between reflection and refraction is that reflection of light is the process in which light bounces back on striking the surface, while refraction of light is the process in which light changes its direction as it passes from one medium to another medium reflection vs refraction. All these topics are included in cbse solved test papers of. Total internal reflection total internal reflection at a glassair interface. If light passes into a medium with a smaller index of refraction, the angle of refraction is larger. The law of reflection snells law states that the ratio of the sines of the angles of incidence and refraction is equivalent to the ratio of velocities in the two media, or equivalent to the opposite ratio of the indices of refraction. Refraction of light is the change in direction of a light ray when it travels from one medium to another. Light is an electromagnetic ray that travels in a straight line reflection of light.
And yet, we find that while light travels in a medium, unobstructed by any obstacles, it will travel. Refraction of light introduction olympus life science. Class room lecture on reflection and refraction of light. When light travels from a rarer medium to a denser medium, it bends towards the normal. Reflection and refraction when light hits a surface, one or more of three things may happen. When a ray of light enters a denser medium it is refracted towards the normal in such a manner than the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant, this. Light reflection and refraction class 10 physics complete. Rule 1 when a ray of light goes from an optically rarer medium to an optically denser medium, it bends towards the normal. Light rays change direction when they reflect off a surface, move from one transparent medium into another, or travel. In this case the angle of refraction will be smaller than the angle of incidence. Real images are formed when rays of light that comes from an object or source meets at a point after reflection from a mirror or refraction from a lens. When light travels from a denser medium to a rarer medium to a rarer medium, it bends away from the normal.
Navy supplement to the dod dictionary of military and associated terms pdf. Speed of light in vacuum is 3 lakhs kms reflection of light by plane and spherical mirrors mirror is a object having one highly polished surface and other painted. Like reflection, refraction also occurs for other types of waves like sound, water etc. Light reflection and refraction class 10 notes science. For incident angles larger than the critical angle, there is no refraction. Refraction and reflection of light pdf refraction of light and the simple laws which govern those processes. The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane. Light, reflection, and color characteristics of light light is an electromagnetic wave. This topic covers reflection and refraction of light of o level physics.
It can be complemented by phet simulations on geometrical optics. Equivalent to american high school diploma subtopics. It occurs from smooth surfaces such as plane mirrors, still water etc. The light may be reflected back from the surface, transmitted through the material in which case it will deviate from its initial direction, a process known as refraction or absorbed by the material if. Light reflection and refraction notes for class 10. Mcq questions for class 10 science light reflection and. Total internal reflection in total internal reflection all of the light is reflected at the interface between two media. To locate an image, any two of these three rays can be chosen.
Cbse class 10 science chapter 10 light reflection and refraction notes in pdf are available for free download in mycbseguide mobile app. Using that the speed of light is v c n we deduced that. Class 10 reflection and refraction of light light is the form of energy having both wave and particle nature. When light falls on a surface and is reflected back into the same medium, we say reflection has taken place refraction of light. Light rays change direction when they reflect off a surface, move from one transparent medium into another, or travel through a medium whose composition is continuously changing. Light is a very complex phenomenon, but in many situations its behavior can be understood with a simple model based on rays and wave fronts.
Home o level reflection and refraction of light o level reflection and refraction of light o level january 19, 2020 july 1, 2012 by mini physics. In very intense electromagnetic fields, the vacuum refractive index is expected to be modified due to nonlinear quantum electrodynamics qed. Reflection and refraction of light goals and introduction when a source creates light, it is common that the there is no preferential direction in which the light is emitted. The reflection and refraction of light 72799 rays and wave fronts. Students can solve ncert class 10 science light reflection and refraction multiple choice questions with answers to know their preparation level. The result is the same light appears to be coming from the source. These basic concepts will help us in the study of some of the optical phenomena in nature. Pdf reflection and refraction of light from metasurfaces. When a ray of light is incident normally to the interface of two media it will go straight, without any deviation. The law of reflection states that, on reflection from a smooth surface, the angle of the reflected ray is equal to the angle of the incident ray. Reflection, is when the light goes back to the previous medium, but changes direction.
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