During the 19th and 20th centuries there was a lot of debate about the true nature of light. Free pdf download of ncert solutions for class 10 science physics chapter 10 light reflection and refraction solved by expert teachers as per ncert cbse book guidelines. Reflection and refraction reflection and refraction at once. The result of his observations was to provide indisputable evidence that the geocentric model of the universe described by aristotle and later ptolemy could not be correct. Reflection occurs when light bounces off a surface. You will learn how to use the ray model for describing the behaviour of light and you should be able to apply the model to simple. Light is an electromagnetic ray that travels in a straight line reflection of light. Use lens formula to find the distance x in the given diagram. At the interface between two facets of an artificial crystal, sound waves can be transmitted in the opposite direction to that expected, and undergo no reflection. In this chapter, we shall study the phenomena of reflection and refraction of light using the straightline propagation of light.
There is an angle of incidence for which the angle of refraction will be 90. Reflection and refraction when light hits a surface, one or more of three things may happen. When electromagnetic radiation, in the form of visible light, travels from one substance or medium into another, the light waves may undergo a phenomenon known as refraction, which is manifested by a bending or change in direction of the light. Identify which rays of light illustrate refraction, reflection and absorption. Reflection forbidden and refraction reversed in an. One surface is a shiny metal, one surface is clear plastic, and one surface is painted black. Light as waves and particles reflection, refraction, dispersion. A student focused the image of a candle flame on a white screen by placing the flame at. 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. This physics video tutorial discusses snells law and the index of refraction of light.
List four properties of the image formed by a plane mirror. The principal focus of a concave mirror is a point f on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror. Here, a recap of laws of reflection of light is mentioned. Corpuscular theory of light physics and radioelectronics. Diffraction is the spreading of light when it passes through a narrow opening or around an object. The direction of bending is dependent upon the index of refraction of the two media. Important question for class 10 science light reflection and refraction pdf will help you in scoring more marks this consists of 1 mark questions, 3 mark numericals questions, 5 marks numerical questions and previous year questions from light reflection and refraction chapter. Materials that can bend light in the opposite direction to normal lefthanded materials reverse the way in which refraction usually works this negative refractive index is due to. Define the terms reflection, refraction, and index of refraction and explain how they are related.
Cbse class 10 science chapter 10 light reflection and. It discusses the difference between the law of reflection and refraction. Free pdf download of cbse class 10 science chapter 10 light reflection and refraction multiple choice questions with answers. Explain diffraction and interference in terms of huygens principle. Class 10 science chapter 10 light reflection and refraction. Refraction is the bending of light as it moves from one medium to another. Refraction of light introduction olympus life science. The ratio of sine of angle of incidence to the sine of angle of refraction is a constant, for a light of given colour and for a given pair of media. Even though we sometimes think light is white, it is actually made up of all the colors in the rainbow. The concept of reflection on planar mirrors is then introduced. L2 reflection and refraction objectives general aims when you have finished studying this chapter you should understand the nature of reflection and refraction of light and the simple laws which govern those processes.
Notes of ch 10 light refraction class 10th science. Class 10 science mcqs chapter 10 light reflection and refraction. Ncert solutions class 10 science chapter 10 light reflection. Reflection by plane mirror laws of reflection group. It is formed at the same distance behind the mirror as the object is in front of the mirror. Light reflection and refraction class 10 physics complete. It is the ratio of the size of the image to the object size. Blackbody and laser radiation look so different but are the. Some scientists argued that light was an electromagnetic wave because it refracts and interferes and because of maxwells wave equations which were confirmed by hertz.
Students can solve ncert class 10 science light reflection and refraction multiple choice questions with answers to know their preparation level. In this hands on lesson trace a path of light to investigate what reflection is. It was a tenacious understanding of light that led to quantum mechanics and modern physics. On the flip side, refraction is when light is absorbed by the medium but the direction and speed is affected. Jan 07, 2020 students can solve ncert class 10 science light reflection and refraction multiple choice questions with answers to know their preparation level. Laws of refraction i 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. Download free printable worksheets physics pdf of cbse and kendriya vidyalaya schools as per latest syllabus in pdf, cbse class 10 physics worksheet lightreflection and refraction practice worksheets for cbse students.
Mcq questions for class 10 science with answers was prepared based on latest exam pattern. You are already familiar with the laws of reflection of light. The transverse nature of light can be demonstrated through polarization. Waves unit study guide key 4 each picture below shows a ray of light interacting with a different surface. We say that light is refracted when it travels through water. If light passes into a medium with a smaller index of refraction, the angle of refraction is larger. The first section of the chapter deals with the phenomena of reflection of light. Light as waves and particles reflection, refraction. Cbse class 10 physics worksheet lightreflection and refraction practice worksheets for cbse students. Light is a transverse, electromagnetic wave that can be seen by the typical human. 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. Difference between reflection and refraction with comparison. The principal focus of a concave mirror is a point f on its principal axis to which all the light rays which are parallel and close to the. Total internal reflection if the angle of incidence is larger than this, no transmission occurs.
Galileos observations were made possible by one simple physical principle related to the wave nature of light refraction. Make observations to provide evidence that energy can be transferred from place to place by sound, light, heat, and electric currents. A change of media is required for refraction to take place. Module 8 refraction refraction in the early 1600s, galileo turned a small telescope to the sky and observed the mountains of the moon, the phases of venus, the rings of saturn, and the rotation of the sun. In fact, rays were used to describe the propagation of light long before its wave nature was established. 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. Cbse class 10 physics light reflection and refraction. Prepared by teachers of the best cbse schools in india. Jan 20, 2020 because diamond has a particularly high index of refraction, it can still sparkle as a result of total internal reflection, not invisible. Oct 01, 2019 important question for class 10 science light reflection and refraction pdf will help you in scoring more marks this consists of 1 mark questions, 3 mark numericals questions, 5 marks numerical questions and previous year questions from light reflection and refraction chapter. It is a common phenomenon that lens is used to magnify objects.
Because diamond has a particularly high index of refraction, it can still sparkle as a result of total internal reflection, not invisible. Chapter 10 light reflection and refraction is one of the important chapters in class 10 science and the expected marks weightage of the chapter according to the latest marking scheme is 7 marks. Light reflection and refraction class 10 mcq with answers pdf question 1. Thus in general we have simultaneous reflection and refraction at the smooth boundary between 2 transparent media. Refraction occurs as light passes from one medium to another only when there is a difference in the index of refraction between the two materials. Reflection, is when the light goes back to the previous medium, but changes direction. Mcq questions for class 10 science light reflection and. The wave nature of light was first illustrated through experiments on diffraction and interference. When light travels from one medium to another it bends from its original path this phenomenon is. Important questions for cbse class 12 physics reflection. The natural phenomenon of bouncing back the light in the same medium on striking the.
Nature of light and laws of geometric optics the nature of light reflection refraction index of refraction huygens principle dispersion and prisms. This is referred to as the law of reflection or snells law. Draw the ray diagram and find the position, size and nature of the image formation. Science ncert grade 10, chapter 10, lightreflection and refraction covers a number of common wonderful phenomena associated with light. All chapter 10 light reflection and refraction exercise questions with solutions to help you to revise complete syllabus and score more marks. When light strikes the boundary between two media, three things may happen.
Cbse class 10 science chapter 10 light reflection and refraction notes properties of light an electromagnetic wave so does not require any medium to travel light tends to travel in a straight line light has dual nature i. The waveparticle duality of light was not well understood until albert einstein won his nobel prize in the early 20th century. The chapter explains the concepts associated with light under four sections. It begins by addressing the nature of light and its behavior as it travels through air. 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. In our light reflection and refraction class 10 notes pdf, you can see that the formula uses the reciprocal of all these parameters. Its value is 3 x 10 8 ms when light falls on a surface, the following happens reflection refraction absorption what is reflection of light. When light falls on a surface and is reflected back into the same medium, we say reflection has taken place refraction of light. Swbat define light reflection and identify similarities between refraction and reflection. Ncert solutions for class 10 science chapter 10 light reflection and refraction. At the interface between two facets of an artificial crystal, sound waves can be transmitted in the opposite direction to that expected, and undergo no. The eyes and brain trace the light rays back into the water as though they had not refracted, but traveled from the object in a straight line, creating a virtual image of the object that appears at a shallower depth. This bending is due to a change in speed that occurs as the light moves between regions of greater or lesser optical density.
Like all electromagnetic waves, light can travel through a vacuum. Knowing the difference between reflection and refraction will help you understand basic phenomenon of science. When the corpuscles particles hit the reflecting surface, they are reflected from it in such a way that the angle of incidence is equal to the angle of reflection. Aug 10, 2017 laws of refraction i 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. An image is formed when the light rays coming from an object meet at a point after reflection from a mirror or refraction from lens. Aug 06, 2016 this physics video tutorial discusses snells law and the index of refraction of light.
Difference between reflection, refraction, and diffraction. Ncert cbse solutions for class 10 science chapter 10. Numericals on light class 10 science physicscatalyst. Ncert solutions for class 10 science chapter 10 light. One can measure the critical angle by looking for the onset of total internal reflection as the angle of incidence is varied. To register science tuitions on to clear your doubts. Refraction is the bending of light when it travels from one media to another.
807 1252 57 988 391 1457 726 526 1189 1433 1037 841 941 692 434 1398 1340 1027 1385 922 155 681 941 554 1259 1441 1162 550 4 350 217 426 495 227 1351 404