When light slows down or speeds up it changes direction a little bit. Leaner/ freestanding mirrors don't need to be wall-mounted, and are usually full-length. 4 Refraction. We suggest starting with this section: The Basics of Light, then move into tutorials on the ... teachers, but the materials are now available for free download. Spherical Mirrors . Following an earthquake, the mirror is in place and unbroken. The primary images I 1 and I 2 are simple an image resulting from the reflection of light off of mirrors M 1 and M 2. A cast shadow is not a solid shape but varies in tone and value. Section 4. 80°! Which best describes the image of a concave mirror when the object's distance from the mirror is less than the focal-point distance? 5. A medium is a substance like water, air, or glass. Cut off the source of the light or stop it from reaching your eyes and those objects disappear. Section 11.3: Describing Images Pin Hole Camera Flat mirrors first. There are three basic shapes that a lens can have: concave, convex, and planar. 10° 7. The secondary image I 3 is an image of an image. A medium that is polished well without any irregularities on its surface will cause regular reflection of light. , Reflection and light refraction: several optional questions, quizzes with answers. Cast Shadow. Worksheets are synchronized to readings from The Physics Classroom Tutorial and to sublevels of the Minds On Physics Internet Modules. Reflection of light by other media. Two Kinds of Shadows . Determine the path the light takes from a given light source. 1 x sin (45 degrees) = 1. _____ 1. Figure 1a is taken 20cm in front of a mirror (you can see the camera). Sections 2.3-2.5 Pages 197-211 Remember to use a ruler and to show that the angles are the same. A smooth surface gives a specular reflection. a. Reflection is the process in which light strikes a surface and bounces back off that surface. – Diffuse reflection is reflection from a rough, texture surface such as paper or unpolished wood. Laws of Reflection. The angle of the incidence refers to the angle between the incident ray and the surface normal (an imaginary line perpendicular drawn to the surface). When viewing these images, light from the object will reflect off one of these mirrors and travel towards the viewer's eye. Section 35.4 Reflection . QUIZ 8K on "Light" Questions on reflection of light, mirrors, shadows, light bending, visible spectrum; QUIZ 8L on "Sound and hearing" Questions on sound waves, pitch/frequency, loudness/amplitude, comparing speed of light/sound, hearing - function of ear. b. Before, understanding the concept of sign conventions for spherical mirrors first discuss some commonly … If it hits a smooth surface, the light reflects at an opposite angle to the angle it hits. Place a letter in the blank in order to classify the following objects as being either luminous ( L ) or Consider a point source of light placed at O in Fig-ure 36.1, a distance p in front of a flat MOP Connection: Reflection and Mirrors: sublevel 1 1. A mirror is fastened flat against one section of the ceiling. The reflectivity (or reflectance) is the percentage of the optical power which is reflected. •The texture of a surface affects how it reflects light. Full-length mirrors/ dressing mirrors are long and narrow, as they're designed to give you a full-length reflection. The reflection of light is similar to the bouncing of a ball in that the angle at which the light hits the reflecting surface is identical to the angle at which it bounces off of it (Figure 2). Discuss the difference between reflection and refraction. Mirrors have a very smooth surface. (EP B19 and B25) K4. The Law of Reflection This site has a detailed explanation and an animation showing the Law of Reflection. Learn how to set up inquiry-based labs on prisms, mirror reflection, magnification, light refraction, and image formation through lenses. But even then some light gets absorbed by the surface. There are two kinds of shadows that occur when one light shines on an object, a cast shadow and a form shadow. Chapter 19: Light, Mirrors, and Lenses Section 2 Self-Check Quiz-Eng. happens. Holt Physics 85 Quiz Section Quiz: Flat Mirrors Write the letter of the correct answer in the space provided. A plane mirror always forms a virtual image that is upright, and of the same shape and size as the object, it is reflecting. If the ray of light is in angle with the surface, then the angle between the incident ray and the normal will be the same angle between the normal and the reflected ray. 10. What is the angle that the reflected ray makes with the surface of the mirror?! A plane mirror is a flat, smooth reflective surface. A plane mirror refers to a mirror with a flat (planar) reflective surface. The most obvious thing about light is that it will reflect off things. Which of the following best describes the image produced by a flat mirror? ˜˚.˛ Images Formed by Flat Mirrors Image formation by mirrors can be understood through the analysis of light rays following the wave under reflection model. How it bounces off the surface depends on the Law of Reflection and the type of surface it hits. In figure 3a we caught this reflection on a piece of paper. 14° from the normal. Perfect reflectors are common. a. less than b. equal to Assessment Light and Reflection - SCHOOLinSITES the mirror. If it hits a rough surface, the light is scattered. Reflection. The only reason we can see the things around us is that light, either from the Sun or from something like an electric lamp here on Earth, reflects off them into our eyes. Section 11.2: Reflecting Light off Surfaces Specular vs. Diffuse Reflection The behaviour of light is often studied by observing its reflection off of plane (flat) mirrors. Your Results: The correct answer for each question is indicated by a . virtual, upright, and magnification equal to one. Section 35.5 Refraction . Wall mirrors are designed to be hung, and come in lots of shapes and sizes suited to every room and every purpose. a. Holt Physics 85 Quiz Section Quiz: Flat Mirrors Write the letter of the correct answer in the space provided. This is called specular reflection but with children we just call it mirror reflection (Figure 2a and 3a). Reflection and Mirrors The following downloadable PDF files represent a collection of classroom-ready worksheets pertaining to the topic of Reflection and Mirrors. The angle should be measured from the light ray to the red dotted line (called the normal line) NOT from the ray to the mirror surface. Reflection of light : If we draw a line perpendicular to a surface, this line is the normal of the surface. Perfect reflectors are common. The images formed by a spherical mirror can either be real or virtual. Section Review 17.1 Reflection from Plane Mirrors pages 457–463 page 463 6. Refraction Watch the video below really carefully. Reflection A light ray strikes a flat, smooth, reflecting surface at an angle of 80° to the normal. (Reflect) (EP B19) K3. Section 2 Flat Mirrors Chapter 13 Reflection of Light • Reflection is the change in direction of an electromagnetic wave at a surface that causes it (a wave) to move away from the surface. If a surface is rough, diffuse reflection. Each light ray obeys the law of reflection but hits the surface at a different angle because the surface is uneven. Generally, it depends on the wavelength and the angle of incidence, for non-normal incidence often also on the polarization direction. Holt Physics 85 Quiz Section Quiz: Flat Mirrors Write the letter of the correct answer in the space provided. ... Holt Physics 86 Quiz Name Class Date Light and Reflection continued _____ 7. Which of the following statements is not true about the reflection of light? A spherical mirror is a mirror that has a consistent curve and a constant radius of curvature. This circumstance is called the law of reflection. Your quiz will cover: Given two of magnification, image height, and object height, find the third ; Know that the magnification of an inverted image is negative . Science8 Unit C Lightand Optics Section2 Lesson4 Mirrors Lensesand Refraction [Autosaved] 1. To simplify the study of light and shadow in this first section, I will use only one light source. While studying the reflection of light by spherical mirrors and the formation of images by spherical mirrors, a set of sign conventions are needed to learn that is required to measure the focal length, a distance of object or image from the mirror, and the magnification of the mirror. – Diffuse reflection is reflection from a rough, texture surface such as paper or unpolished wood. For a flat mirror, object distance (p) is always image distance (q). • The texture of a surface affects how it reflects light. 25 × 108 m/s. The light beam is reflected in a particular direction and can only be seen in that direction. K2. These might be hung on the wall, or can be freestanding. Need a Hint? All lenses bend and refract rays of light. Various basic properties characterize a mirror: Figure 1: Reflection of light on a mirror. Look at the picture of Dr. Toggerson below in Figure 1. r, mirror 90° "r! " 22, 2015 - Learn all about light refraction by simply inserting your pencil to show lines of reflected light and then answer questions about light. 1: What is called the normal to the surface? In the refraction section we said that light changes speeds when it moves from one medium to another. When a ray of light hits the surface of an object, part of the light is reflected. Flat mirror: ¥ -|p|=|q| ¥ M = 1 ¥The image is virtual ¥The image is upright . A mirror is a surface that is smooth enough that it produces specular reflections - clear reflections where you can see an image. Most surfaces have tiny imperfections that stop light … Identify what different surfaces can absorb light and reflect light. A dance hall is built without pillars and with a horizontal ceiling 7.20 m above the floor. i! Chapter 13 Section 2 Flat Mirrors Reflection of Light • Reflection is the change in direction of an electromagnetic wave at a surface that causes it to move away from the surface. We begin by considering the simplest possible mirror, the flat mirror. does not see a light spot on the mirror. Light is shone through a glass block. r!! The luminous velocity in sodium When you look in a flat bathroom mirror, your image is the same height as you are. When an object blocks a light source it casts a shadow. 80°! The incident ray, reflected ray and the normal all lie in the same plane. All substances absorb at least some incoming light and reflect the rest. The light rays when striking a plane mirror, the angle of reflection equals the angle of incidence always. For example, a plane mirror. A ray diagram showing how an image forms in a plane mirror Diffuse reflection. Which of the following statements is not true about the reflection of light? 13.1 Light and Reflection Section WS; 13.2 Diagram Skills Flat Mirrors; 13.2 Light and Reflection Section Quiz: Flat Mirrors; 13.3 Problem B IMAGING WITH CONCAVE MIRRORS; 13.3 Problem C CONVEX MIRRORS; 13.3 Diagram Skills Curved Mirrors; 13.4 Concept Review Color and Polarization; 13.4 Light and Reflection Section Quiz: Color and Polarization ; 13 Mixed Review; Chapter 14; 14.1 Problem A … ( straight line) (EP B19) • Illustrate the path the light takes after hitting a mirror. All substances absorb at least some incoming light and reflect the rest. If a light ray strikes a flat mirror at an angle of 14° from the normal, the reflected ray will be? _____ 1. Therefore, each ray reflects at a different angle, and you don’t see a clear reflection. b.
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