Two different types of mirror are concave and convex mirror with different properties. In order to understand mirrors, we first must understand light. This is because a convex mirror is the same as a concave mirror pointing in the opposite direction. The easiest way to visualize what a image will look like in this type of mirror is a ray diagram. The purpose of this activity is to measure the focal length of a concave mirror. Incident rays at least two are drawn along with their corresponding reflected rays. The virtual ray extrapolated from the incident ray will pass through the centre of curvature. Physics mirrors are where light can be reflected and reconvened to form images. Snc 2d light and geometric optics concave mirrors extra practice worksheet a draw a ray diagram for each to locate the image.
Convex mirrors are used as rear view mirrors by drivers in vehicles and as reflectors in street lights. 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 mirrors surface. Choose your answers to the questions and click next to see the next set of questions. This data chart guides children in exploring convex and concave mirrors and lenses and their effects on. The same object is placed at different distances d in front of six different concave spherical mirrors. Drawing lens diagrams gcse physics revision science with. A convex lens is thicker in the middle than it is at the edges. This figure shows the difference between a concave and convex mirror. Concave mirror uses light physics science icse, cbse. Alevel physics help examples of physics personal statements gcse physics help lastminute gcse physics revision. Physics 101, learn physics, physics lessons, gcse physics. A mirror is a part of a smooth and highly polished reflecting surface.
Its basically two concave mirrors glued together around their edges, forming a flyingsaucer shape with a mirrored interior. As the object moves closer to the mirror s surface the magnification of the virtual image decreases. Converging convex lens worked example ray tracing 4 of 5 geometric. Convex and concave lenses lenses aqa gcse physics single. Presented in figure 4 are parallelray traces indicating the principal rays and location of an image formed by a concave. Learn about concave mirror uses light physics science icse, cbse. Blank ray diagrams for converging, concave, mirrors printer friendly version to reduce the possibility of spherical aberrations, that is, blurred images formed by rays not reflecting to a precise point, these concave mirrors are being represented by vertical lines. The 16 best gcse physics videos gcse physics, physics.
Convex parabolic mirrors video mirrors khan academy. Parallel rays of light or other electromagnetic rays are brought to a focus by the concave mirror to form a real image. In this experiment, you will measure the focal length of a concave mirror, locate images produced by real concave mirrors and compare their position to the position predicted by a ray diagram. A concave mirror curves or bends inwards and makes an object look bigger and nearer than it actually is. Just how much do you know about the different types of lenses and mirrors. If youre behind a web filter, please make sure that the domains.
Concave mirrors are used as shaving mirrors, as reflectors in flashlights and automobile headlights, and by doctors e. A concave mirror is used in a reflecting telescope. Rank the images on their bases of size largest to smallest. This website and its content is subject to our terms and conditions. Included extensions greatly benefit learners, so take advantage of the. Frankl your own mind is a sacred enclosure into which nothing harmful can enter except by your promotion. They are often used as shaving mirrors to see a larger image of the face. Fix the concave mirror in the mirror holder and place it on edge of the table. Background concave and convex mirrors are examples of spherical mirrors. Concave mirror convex mirror image formation by concave mirror concave mirror ray diagram image formation by convex mirror. As the object moves toward the focal point f the image size increase and until at f the image is infinite in height object beyond f. Burn the textbooks, shred the worksheets, teach math.
For the love of physics walter lewin may 16, 2011 duration. Before that can be done, the focal point must first be defined. Free support resources for physics for you 5th edition. Mirrors that curve or bulge outward are called convex mirrors. Scholars experiment with real and virtual images before reading a handout and completing homework questions. Why does he from 1 point on the book, draw 1 light ray but from the other point. See more ideas about physics revision, physics and science revision. Its inner concave surface reflects, and has polished outer surface. This type of mirror gives a wide field of view and is used in security mirrors in. Graphical or ray tracing techniques represent an easy and popular method for determining the position of images formed by a mirror. Convex mirror could be even smaller and concave would need to be larger. Mirror equation example problems video khan academy.
For situations involving multiple lenses or mirrors, the image formed from one of these components can act as the object for another one. It works by making light rays seem to come from a point in front of the mirror, which is closer to our eyes. For convex mirrors, the mirror equation is slightly different than for concave mirrors. Concave and convex mirrors ray diagram for convex and. In a concave mirror, the principal axis is a line that is perpendicular to the center of the mirror. Mar 8, 2018 this pin was discovered by cherly silmaro. They separate but appear to come from a principle focus on the other side of the lens.
Concave mirrors curve inward, creating a focal point in front of the mirror. Isaac physics a project designed to offer support and activities in physics problem solving to teachers and students from gcse level through to university. Two types of image formed by mirrors are real image and virtual image. A spherical mirror is a mirror that has the shape of a piece cut out of a spherical surface. Beyond f the image becomes virtual that is it cannot be projected. However, when you move closer to the mirror, the image enlarges moving closer to the mirror rightside up, virtual image. The law of reflection says that when a ray of light hits a surface, it bounces in a certain way, like a tennis ball thrown against a wall. With a concave mirror, its like youre looking at the mirror from what would be the inside of the ball, so it. Use a light source, concave mirror, and half screen accessory on an optics bench to measure the focal length of the concave mirror. Concave mirrors physics online, physics help, physics course.
To find the focal length of the given concave mirror by i by uv method ii from u v graph iii from 1u 1v graph. The location of images produced by spherical mirrors can be determined experimentally, graphically, or through applying geometric formulas. An image which can be formed on the screen is known as real image and the one which cannot be formed on screen is known as a virtual image. Tes global ltd is registered in england company no 02017289 with its registered office.
Concave mirrors curve inward, like the interior of a bowl. The image is virtual, erect and smaller in size than the object, but gets larger maximum upto the size of the object as the object comes towards the mirror. Edexcel international gcse physics 4ph1 for exams from 2019. Images in concave mirrors appear upside down, real and reduced. A ray parallel to mirror axis passes through the focal point of a concave mirror or appears to come from the focal point of a convex mirror.
Gcse physics reflection of light from a concave mirror making. Lenses and mirrors observation activity with images mirrors and. The incoming angle, called the angle of incidence, is always equal to the angle leaving the surface, or the angle of reflection. Each ray intersects at the image location and then diverges to the eye of an observer. This diagram is comparing and contrasting concave versus convex mirrors.
A spherical mirror is a part of a spherical reflecting surface. When light is a reflected from a curved mirror the light rays change direction in the same way that they do when they. Chapter 23, reflection chapter 24, curved mirrors chapter 25, refraction chapter 26, lenses chapter 27, optical instruments chapter 28. You can skip questions if you would like and come back. Reflection of light from a concave mirror when light is a reflected from a curved mirror the light rays change direction in the same way that they do when they pass through a lens a convex mirror disperses light like a concave lens and a concave mirror focuses light like a convex lens a concave mirror is used in a reflecting telescope parallel rays of light or other. 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. When light hits a surface at a low angle like on a lake at. The dentists use concave mirrors to see large images of the teeth of patients. A real image is where the light comes together to form an image on a screen. You set the gadget on the table with the hole facing upward, and put a coin or other small object inside, on the lower mirror, directly underneath the hole. In this trivia questions quiz, you will get to learn some more about the different lenses and mirrors and how they differ from each other.
If youre seeing this message, it means were having trouble loading external resources on our website. Note the negative sign in front of the focal point. It is a mirror which has the shape of a piece cut out of a spherical surface. The image is also no longer inverted but is magnified. Every observer would observe the same image location and every light ray would follow the law of reflection. Convex mirror whose outer surface is reflecting,it forms virtual image and is used to get magnified image,while concave mirror whose inner surface is reflecting,it forms real and virtual images and its is used to get small images. Its sort of like if you were to take a mirror thats shaped like a ball, and cut off one side of it. Concave mirror are commonly used inn torches, searchlights and vehicles headlights to get powerful parallel beams of light. A ray diagram shows the path of light from an object to mirror to an eye. Convex mirrors reflect light outwards diverging light rays and therefore they are not used to focus light.
A mirror is a surface which reflects a clear image. Discover concave and convex mirrors using a laser light. A concave mirror, a mirror holder, a semi transparent screen fixed to a stand and a small candle with stand. Gcse physics reflection of light from a concave mirror. There are two types of lenses, and they each change the perspective of how things look. Concave mirrors are important in such things as bicycle reflectors and reflecting telescopes. In this article, we will be studying the spherical mirrors structure and its different types in detail. A textbook for high school students studying physics. The image distance for a plane mirror is always equal to the object distance because the magnification is 1. Convex mirror is a curved mirror for which the reflective surface bulges out towards the light source. See more ideas about gcse physics, physics and science.
Concave and convex mirrors are basically mirrors that are bent. Similarly to for concave mirrors, we are going to assume a small spherical mirror with both a centre of curvature and a focal point. Concave mirrors and convex mirrors image formation, ray. If the object and image are the same distance from the mirror and magnification is 1, then as the object approaches the mirror at a certain speed, the image is approaching the plane mirror at the same speed, therefore you approach the image more quickly than you approach. A concave lens is thinner in the middle than it is at the edges. A helpful revision guide for convex and concave mirrors, and lenses, such as image magnification, for gcse physics. Place it in front of the concave mirror on the left hand side i.
Physics revision gcse physics physics notes gcse science science. There are two types of spherical mirrors, convex mirror and concave mirror. So this mirror, the way its shaped right here, based on how were looking at it, is a concave mirror. A concave mirror is composed of a reflective surface with its sides curved closer in distance to your eye than its middle surface. Makeup mirrors are concave mirrors because they enlarge the image. Convex mirror is a curved mirror for which the reflective surface bulges out towards the. Nature of image formed by convex lens and concave lens. In the first part of this gcse physics revision video, hazel teaches you the meaning of key definitions such as convex, concave, focal length.
Read about properties of convex mirror and concave mirror at. There are two types of spherical mirrors convex mirror and concave mirror. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 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. And with the sign conventions we just discussed and the signs im using in this formula, concave mirrors always have a positive focal length.
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