Sign convention for spherical mirrors the sign conventions for the given quantities in the mirror equation and magnification equations are as follows. It might help you to remember this if you think that when you look in a concave mirror, it looks like you are looking into a cave. Just how much do you know about the different types of lenses and mirrors. Convex mirror problems and solutions solved problems in. The surface may be either convex bulging outward or concave. This is a product that i created for my high school physics students. A ray passing through the focus of a concave mirror or proceeding toward the focus of a convex mirror is reflected parallel to mirror axis. Introduction my topic is about convex and concave mirrors. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. Again, begin by the identification of the known information. In this article, we will learn about image formation by concave and convex mirrors.
A spherical mirror is a part of a spherical reflecting surface. Although equation 2012 was derived for an object distance greater than r, it applies to a concave mirror when the object is anywhere on the optical axis of the mirror. Conversely, the concave lenses are thinner at the centre and thicker at its edges, in structure. The incident and reflected rays follow the laws of reflection at the point of incidence point p, making equal angles with.
Mcq questions for class 10 science light reflection and. Equation 2012 also applies to a convex mirror, and the derivation of equation 2012 may be reconstructed for that case using figure 20. A concave amkeup mirror is designed so that a person 28. Use the mirror formula to show that aan object placed between f and 2f of a concave mirror produces a real image beyond 2f ba convex mirror always produces a virtual image independent of the location of the object can object placed between the pole and focus of a concave mirror. Mar 26, 2020 just how much do you know about the different types of lenses and mirrors. Throughout this prezi you will be learning about what convex and concave mirrors are. How far from the mirror is the image of the star if the radius of curvature is 124 cm. Snc 2d light and geometric optics convex mirrors extra practice worksheet a draw a ray diagram for each to locate the image. Determine a the image distance b the magnification of image. It also contains a few examples and practice problems along with.
It also contains a few examples and practice problems along with the equations needed to solve it. A dentist uses a spherical mirror to produce an upright image of a patients tooth which is magnified by a factor of 4. The focal length of a convex mirror is 10 cm and the object distance is 20 cm. Use ray tracing to determine the location of the image. Incident light rays which are parallel to the central axis red re. Each mirror has a radius of curvature r which is in. 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.
Concave and convex mirror questions cyberphysics concave and convex mirror questions construct optical diagrams to answer these questions. This physics video tutorial provides the ray diagrams for a concave and convex mirror. The principal focus of a convex mirror is a point on its principal axis from which a beam of light rays, initially parallel to the axis, appears to diverge after being reflected from the convex mirror. In a concave mirror reflection of light takes place at the concave surface or bentin surface as shown below in the figure. The purpose of this activity is to measure the focal length of a concave mirror. Pdf optical images due to lenses and mirrors researchgate. Define the following terms in relation to concave spherical mirror. Eight important differences between convex and concave lens are compiled in the article in tabular form.
Concave mirror problems and solutions solved problems in. Worksheets are convex concave polygons 1, 6 introduction to polygons, work 1 revised convex polygons, unit notes introduction to polygons, name period gp unit 10 quadrilaterals and p, polygons, classifyingpolygons, concaveconvex s1 identifying shapes. If the focal length of a concave mirror is 60 cm, what is the radius of curvature. A concave mirror has a radius of curvature of 4 meters. The focal length f of the concave mirror is 4 cm, therefore the patients teeth should be less than 4 cm in front of a concave mirror. A concave mirror collects light from a distant star. Use a light source, concave mirror, and half screen accessory on an optics bench to measure the focal length of the concave mirror. The detailed explaination about concave and convex mirrors is as follows. Since a concave mirror converges a parallel beams of light rays, it is also called converging mirror. View homework help 3 convex mirror problems and solutions. Concave mirror, 10cm dia, 10cm focal length eisco labs. The concave mirror can give erect and enlarged image when the object is placed between pole and focus. A 5cmlong mascara brush is held upright 20 cm from the mirror.
Convex lenses a convex lens is thicker in the middle than at the edges. 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 the object distance is greater than the focal length f then the concave mirror produces an inverted image. There are two types of lenses, and they each change the perspective of how things look. In a convex mirror reflection of light takes place at the convex surface or bent out surface as shown below in the figure. Conversely a concave mirror can produce an upright image if the object distance d is smaller than the focal length f. Convex mirror is a curved mirror for which the reflective surface bulges out towards the. Lenses concave and convex apparatus selection of lenses, collimated light source, e. Its optical axis is an imaginary straight line that is perpendicular to the surface of the lens at its thickest point. This packet includes practice problems for plane mirrors, convex mirrors, and concave mirrors.
Concave mirror problems and solutions solved problems. Convex mirrors are useful because by demagnifying they squeeze a lot of the world into a small image, so they allow us to look in lots of directions at once. Simple conceptual problems illustrate the utility of the results. To create a real image with a concave mirror, the object must be outside the focal point. One mark questions convex mirror for seeing traffic at. Whenever a light ray hits the interface between two tr ansparent materials, generally some of the. Worksheets on concave and convex mirrors teachers pay teachers. There are two types of spherical mirrors convex mirror and concave mirror. Conversely, the concave lenses are thinner at the centre and thicker at its edges, in. Why do we prefer a convex mirror as a rearview mirror in vehicles. Where is the image in this case, and what are the image characteristics. Ncert exemplar problems a concave mirror only b convex mirror only c convex lens only d concave mirror, convex mirror, concave lens and convex lens. A 10 mm long awl pin is placed vertically in front of a concave mirror.
Mirror formula with solved numericals class 10 teachoo. Free pdf download of cbse class 10 science chapter 10 light reflection and refraction multiple choice questions with answers. Background concave and convex mirrors are examples of spherical mirrors. Class 10 science chapter 10 light reflection and refraction. It is converging to the point o, and, if the concave lens had not got in. Consider the case where the shape of the mirror is such that light rays parallel to the axis of the mirror are all focused to a common spot a distance f in front of the mirror. Concave and convex mirror questions construct optical diagrams to answer these questions. Ray hits the vertex of mirror 1 and reflects with same angle. A convex mirror of focal length 32 cm forms an image of a soda bottle at a distance of 19 cm behind the mirror.
A ray incident obliquely to the principal axis, towards a point p pole of the mirror, on the concave mirror or a convex mirror, is reflected obliquely. Their use was demonstrated in lesson 3 for concave mirrors and will be demonstrated here for convex mirrors. Difference between convex and concave lens with figure. In this practice worksheet students will ray diagram on a flat mirror and then on concave and convex mirrors. There will be a window having two buttons named concave mirror and convex mirror.
Let us find out what are mirror and lenses, phenomenas associated with them, applications, convex lens, concave lens, convex mirror, concave mirror in the form of mcqs. Dec 08, 2018 eight important differences between convex and concave lens are compiled in the article in tabular form. Mirror equation example problems video khan academy. Concave and convex mirrors are commmonnly called as spherical mirrors, the spherical mirrors have the radius of curvature twice of the focal length i. Once students have identified the rough location of images using ray diagrams, students will use the mirror equation to solve for di and hi. Ray, coming from first mirror turns back with same path after reflecting from second mirror. The three lenses all have different refractive indices, all radii of curvature are different, the whole thing is immersed in water, the last surface is a mirror, and the object is a. Also, they have a wider field of view as they are curved outwards. Quiz questions will address topics like image distance and an image formed by a convex mirror. One such difference is the structure of convex lens is like, thicker at the centre and thinner at the edges. Light rays which are incident along a line through the focal point blue re.
Figure 3 shows examples of the two types of images. Oct 23, 2019 let us find out what are mirror and lenses, phenomenas associated with them, applications, convex lens, concave lens, convex mirror, concave mirror in the form of mcqs. Therefore different types of images are formed when the object is placed 1. Like curved mirrors, a lens can be convex or concave. Ncert cbse solutions for class 10 science chapter 10.
Convex and concave mirrors by meherzeen daruwala on prezi. 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. Where will the image form if the same object is placed 15 cm in front of a convex mirror with a focal length. Concave mirrors and convex mirrors ray diagram equations. Solve the two equations to obtain numerical values of and. Aug 07, 2016 this physics video tutorial provides the ray diagrams for a concave and convex mirror. Use the mirror formula to show that aan object placed between f and 2f of a concave mirror produces a real image beyond 2f ba convex mirror always produces a virtual image independent of the location of the object can object placed between the pole and focus of a concave mirror produces virtual and enlarged image. Lets explore the ray tracing technique to figure out the properties of images when things are kept in front of a concave or a convex mirror. A concave mirror is a mirror that is curved inward in the middle.
This problem is illustrated in the ray diagram of figure 38. If an object is placed 50 cm in front of a concave mirror of 60 cm radius, where does the image form. The lateral magnification of the mirror or lens is the ratio. A ray passing through the focus of a concave mirror or proceeding toward the. Different types of images can be formed by a concave mirror by changing the position of the object from the concave mirror. Concave and convex mirror questions construct optical. Optics exam2 and problem solutions physics tutorials. This is a four page packet of practice problems that is divided into sections so as not to discourage students.
The sign conventions for the given quantities in the mirror equation and magnification equations are as follows. As a demonstration of the effectiveness of the mirror equation and magnification equation, consider the following example problem and its solution. Use a ray diagram, drawn to scale, to solve example problem 2. Were gonna see the object right here, but were also gonna see the image of the object. What focal length concave lens is needed to form a virtual image 10 cm from the lens when the object is 35 cm from the lens. A concave mirror has a radius of curvature of 24 cm. So imagine our eye, again, is over here, looking at this object inside of the mirror, and were gonna see an image of the object. While clicking on the concave mirror button, a concave mirror, object and its image will be displayed in the window. Difference between convex and concave mirror with comparison. You should be able to find a second, simple equation relating and, based on the information in the introduction. This mirror, this time instead of concave, this is a convex mirror.
A light bulb is 60 cm from a concave mirror with a focal length of 40 cm. Convex mirror always produces inverted images and the size of the image is smaller than the size of the object. They should try to describe any images they form in terms of magnification, upright or inverted, real or virtual. The quiz and worksheet will assess what you know about convex mirrors. A convex mirror can only produce a virtual image since all reflected rays will diverge. Curved mirror problem answer key use the mirror equation and the magnification ratio to solve the following problems. To download free concave and convex mirror questions cyberphysics you need to register. Like all problems in physics, begin by the identification of the known information. A mirror is a part of a smooth and highly polished reflecting surface. Nov 15, 2017 on the contrary, in a concave mirror, the reflecting surface bulges inwards the main difference between a convex and concave mirror lies in the image formed by the two mirrors, i.
Two concave mirrors are placed on same principal axis. A concave spherical mirror has the silvered surface of. Concave and convex mirrors ray diagram for convex and. Now that you know that, look again at the introduction to the problem. The minus sign indicates that the focal point of convex mirror is virtual. On the contrary, in a concave mirror, the reflecting surface bulges inwards the main difference between a convex and concave mirror lies in the image formed by the two mirrors, i. Convex mirror problems and solutions solved problems. Convex mirrors give an erect, virtual, full size diminished image of distant objects. Displaying all worksheets related to convex polygons. The surface may be either convex bulging outward or concave bulging inward.
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