The light rays should obey the law of reflection for every attempt. AttemptĬompare the angle of incidence with the angle of reflection for each block. Repeat steps 2 - 8 for several different angles of incidence.Measure the angle of incidence and angle of reflection for the mirror.Learning about this aspect of lighting all begins with the phrase: The angle of incidence equals the angle of reflection. Join the crosses to show the paths of the light rays. We don’t think about the physics of light and reflections very often, but a basic understanding of light theory can be helpful. Since the angle of incidence equals the angle of reflection and it is given that the angle of incidence is 30 degrees. Using a pencil on the paper, mark the path of:.The aim is to see a clear ray reflected from the surface of the mirror. Move the ray box or paper to change the angle of incidence. The angle between the normal and the incident ray is called the angle of incidence.where is the angle of incidence (equal to the angle of reflection) k /c is. Use the ray box to shine a ray of light at the point where the normal meets the mirror. The magnitude of the critical angle can, in this case, be very small.Place a plane mirror against the first line.Label this line with an ‘N’ for ‘normal’. Use a protractor to draw a second line at right angles to this line. Draw a straight line parallel to its longer sides. Place a 30 centimetre (cm) ruler near the middle of a piece of plain A3 paper.Set up a ray box, slit and lens so that a narrow ray of light is produced.To investigate the reflection of light by a plane mirror. Find the size of the image formed.Reflecting light experiment - plane mirror Investigation of reflection with a plane mirror Aim of the experiment What is the focal length of the mirror?Ī 3 cm high object is placed at a distance of 80 cm from a concave lens of focal length 20 cm. Refractive index of diamond with respect to carbon disulphide will be 1.48.Īn object kept at 20 cm from a spherical mirror gives rise to an image 15 cm behind the mirror. it get incident on the other media and get return to the same media is called as reflection. What is Reflection Reflection is the change of direction of the wave at the interface which separates two media. Calculate refractive index of diamond with respect to carbon disulphide? According to the law of reflection, the angle of incidence is equal to the angle of reflection. Refractive index of diamond is 2.42 and that of carbon disulphide is 1.63. Image Formation in Lenses Using Ray Diagrams Refraction Through Rectangular Glass Slab Sign Convention for Reflection by Spherical Mirrors Representation of Images Formed by Spherical Mirrors Using Ray Diagrams Students can refer to the topics present in Chapter 10 Physics as mentioned below: Students can access the notes for free and practice to get the highest score on the final exam. Mirror images can be photographed and videotaped by instruments. Light is diffused when it reflects from a rough surface. A mirror has a smooth surface and reflects light at specific angles. Vidyakul provides notes to each question in the Year 11 Chapter 10 Physics textbook, taking into account the latest programs. The angle of reflection equals the angle of incidence. This led Maxwell to propose that light itself is transmitted by electromagnetic waves, that is, that light is a form of electromagnetic radiation. Light starts from a light source and bounces off objects perceived by our eyes, and our brains process these signals to ultimately see. Light is a form of energy that allows us to see things. This implies that the light from the object falls on the mirror from the left side. The object is always positioned to the left of the mirror. The angle of incidence equals the angle of reflection.Īll distances parallel to the main axis are measured from the mirror’s pole.Īt the point of incidence, the incident ray, reflected ray, and normal drawn to the reflecting surface all lie in the same plane.Ī concave mirror is one that has been polished from the outer side of a hollow sphere so that the reflecting side is facing the hollow side.Ī convex mirror is one that has been polished from the hollow side of the sphere so that the reflecting surface is towards the bulging side. While studying, the important points to remember from this chapter are as follows: Visit Vidyakul to learn more while studying. These exercises will help you prepare for the exam more easily. Vidyakul provides over 1000 exercises from over 20 books for this chapter. Students can access NCERT notes for Class 10 Science Chapter 10 on Vidyakul. Angle of Incidence Equals Angle of Reflection A key property of light is that when it strikes a reflecting or shiny surface, its angle of incidence. This chapter discusses the reflection of light by spherical mirrors, so its application in real situations is studied. In Science Year 10, Chapter 10, “Light,” students learn the phenomena of reflection and refraction of light using the straight-line propagation of light. Chapter 10 Light Reflection and RefractionĬhapter 10 of the NCERT notes for 10th Grade Science covers the topic of reflection and refraction.
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