The law of reflection gcse physics single science revision bbc. Physics stack exchange is a question and answer site for active researchers, academics and students of physics. Physics formulas physics experiments engineering science science and technology gcse physics physics and mathematics quantum physics primary science physical science. The distance of the focus from the pole of the concave mirror is called its focal length.
A concave mirror is composed of a reflective surface with its sides curved closer in distance to your eye than its middle surface. Learn about and revise lenses, images, magnification and absorption, refraction and transmission of light with gcse bitesize physics. They come together at a point called the principal focus. Links waves light revision questions physics quiz index light quiz. Gcse physics reflection of light from a concave mirror. Reflection of light physics lessons, reflection and. A concave mirror with a focal length of 39 cm creates a 9cm high virtual image 25cm from the mirror does this mean my image distance is negative as its. The reflection of visible light by mirrors and prisms. The type of image produced by a spherical mirror depends upon whether the mirror is concave converging or convex diverging and, for concave mirrors, whether the object is behind or in front of the focal point. It provide online study material for free on physics for cbse class 6 to class mirror physics mirror physics are explained in this section. Mirrors and lenses can be used for a range of uses such as manipulating light. Answers to ray diagram worksheet gcse science physics 91 triple convex lenses find my revision workbooks here. A plane mirror forms an image of an object, which has these properties. When light is refracted it changes direction due to the change in density as it moves from air into glass or plastic.
Physics revisiongcse physicsphysics notes gcse sciencechemistry notesphysical sciencescience lessonsscience symbols. The focus of a concave mirror is a point on the principal axis through which the light rays incident parallel to principal axis, pass after reflection from the mirror. To test this out, stand in front of a single concave mirror and continue to back up until you no longer see an image. Convex and concave lenses lenses aqa gcse physics single. V i 2v m v o i ended up with this equation but my reference book suggests v i. Determine the focal length of concave mirror physics. When the object is less than one focal length away from the converging lens mirror, the image will be virtual and upright. This data chart guides children in exploring convex and. Convex lens are thicker in middle than the edges whereas concave lens are thinner at the middle than at the edges. A convex mirror disperses light like a concave lens and a concave mirror focuses light like a convex lens. Concave mirrors are also known as a converging mirror since the rays converge after falling on the concave mirror while the convex mirrors are known as diverging mirrors as the rays diverge after falling on the convex mirror.
Illuminated and selfluminous objects, reflection of light, experiments investigating mirror, how to do ray diagrams for mirrors, uses of mirrors including plane flat and curved mirrors. Typically such a mirror is not a complete sphere, but a spherical cap a piece sliced from a larger imaginary sphere with a single cut. For concave mirrors, when the object is between f and the mirror, the image will be behind the mirror and will be enlarged and upright. Lets look at what happens to rays of light, traveling at approximately 186,000 miles per second the speed of light, when they strike a concave mirror s surface. In a concave mirror, the principal axis is a line that is perpendicular to the center of the mirror. In this definition the word object may be defined as anything which gives out light rays. Convex mirror concave mirror 922cm corner mirror blind spot office, driveway, offices, stores traffic safety mirror adjustable fixing bracket cubicle mirror convex. Gcse science physics 91 triple convex lenses youtube. Converging and diverging lenses lenses edexcel gcse. In this online lecture, ms vaneeza abbas explains 10th class physics chapter 12 geometrical optics. A concave mirror can focus light rays to a common point f in front of the mirror f is. The powerpower goes over each set and the pdf are learning mats for the pupils they are hand written but fairly neat. Physics revision site recommended to teachers as a resource by aqa, ocr and edexcel examination boards also recommended by bbc bytesize winner of the iop web awards 2010 cyberphysics a physics revision aide for students at ks3 sats, ks4 gcse and ks5 a and as level.
An object of length 6 cm is placed on the principle axis. Once youve reached this point, you will be standing one focal length away from the mirror. A helpful revision guide for convex and concave mirrors, and lenses, such as image magnification, for gcse physics. Answers to edexcel a level physics student book new 91 gcse physics equations sheet. Physics of light byjus is the best place to seek tuitions for physics as well as all subjects of science discipline. Physics p3 aqa light and mirrors teaching resources. Isaac physics a project designed to offer support and activities in physics problem solving to teachers and students from gcse level through to university. Ray diagrams 4 of 4 concave lens and convex mirror shows how to draw the ray diagrams for locating the image produced by a. In an astronomical telescope, a concave mirror of a diameter of 5 meters or more is used as the objective. This resource is a tutorial in how to draw ray diagrams for concave, convex and plane mirrors. What is the relation between image velocity,object.
Refraction is the bending of a light when it enters a medium. Midway between the vertex and the center of curvature is a. Concave mirrors are also used in making astronomical telescopes. We explore what is meant by a convex lens and then we look at how to draw ray diagrams to.
Applications and uses of concave mirror in daily life byjus. Concave mirrors, geometrical optics alevel physics tutor. As with concave mirrors, a ray incident on the mirror with an angle of incidence of zero through the centre of curvature will reflect in the opposite direction with zero angle of reflection. Refraction of two rays at the two surfaces of converging concave lens this page. The line passing through the center of the sphere and attaching to the mirror is known as the principal axis. Help with gcse physics, aqa syllabus a as level and a2 level physics. A concave mirror can be thought of as a slice of a sphere. Find an answer to your question determine the focal length of concave mirror physics practical 12 book 1. For the love of physics walter lewin may 16, 2011 duration. A lens is a shaped piece of transparent glass or plastic that refracts light.
You only have to look as far as the nearest bathroom to find an example of an image formed by a mirror. A mirror is a very smooth, highly polished piece of metal or plastic that reflects virtually all the light that falls onto it. This app provides 67 simulations about physic phenomena and experiments in mirrors and lenses, mechanic, electricity and magnetism, waves, thermodynamic fields and quantum mechanics. You can do a diverging mirror simply by selecting mirror, then pulling the object to the right side. A concave mirror is used in a reflecting telescope. Plane mirrors are used in periscopes, security mirrors and dressing table mirrors. In this article, we will learn about image formation by concave and convex mirrors. Concave mirror, convex mirror, concave and convex mirror s focuses, concave lens, convex lens, concave and convex lens focuses, reflection. Parallel rays of light or other electromagnetic rays are brought to a focus by the concave mirror to form a real image.
If the rays are diverging spreading apart after the lens, extend both back to the left to find a place where the lines meet this will be a virtual image. If a plane mirror is placed perpendicular to the optic axis at a distanc from the pole, facing concave mirror, find the position and nature of the final image formed. Change the location of the object and use the ray diagrams to determine the location of the image. For a concave mirror to focus light coming from a distance to a single point, in a similar fashion to a concave lens, it must have a parabolic shape.
This is similar to a magnifying glass, with a practical use as a makeup mirror. Lens are of various types but the two most important types are convex on biconvex and concave or bi concave lens. Image an image may be defined as that point, where the light rays coming from an object meet or appears to meet after reflection or refraction. Lenses are used in cameras, telescopes, binoculars, microscopes and corrective glasses. We explore how to draw a ray diagram for a concave lens and then we look at the properties. One of the easiest shapes to analyze is the spherical mirror. Aqa gcse physics p14 light kerboodle answers expert. Images in a plane mirror are the same size as the object, are located behind the mirror, and are oriented in the same direction as the object i.
A convex lens is thicker in the middle than it is at the edges. Concave and convex lenses and mirrors, parallel light rays. Concave mirrors are widely used in headlights of automobiles and motor vehicles, torch lights, railway engines, etc. Suitable for gcse igcse physics science courses or their equivalent. The point in the center of the sphere is the center of curvature. See also refraction experiments doc browns physics revision notes. What is the relation between image velocity,object velocity and mirror velocity. Before that can be done, the focal point must first be defined. The reflection appears to be behind the mirror and may look bigger, smaller, or the same size as the thing it is reflecting, depending on the mirror s shape. Visually demonstrate how concave and convex mirrors work.