This video is highly rated by class 7 students and has been viewed 1256 times. Images formed with convex mirrors are always right side up and reduced in size. Exploring concave mirror images the pdf file below accompanies the concave mirror image formation interactive. While drawing images of the object we benefits from the special rays given above. An investigation of student understanding of the real image formed by a converging lens or concave mirror. An optical system mirrors or lenses can produce an image of the object by redirecting the light. A real image is formed by the intersection of real light rays. Apr 11, 2020 image formation by concave and convex mirror class 10 notes edurev is made by best teachers of class 10. Images formed by convex mirror using ray diagram class. Concave and convex mirrors ray diagram for convex and. Apr 09, 2020 formation of convex and concave mirror class 7 notes edurev is made by best teachers of class 7. In mirrors, images are formed through reflection but lenses form images through refraction.
Lets start drawing images of the objects located in different parts of the mirror. Various terms associated with spherical mirrors spherical mirror. This is explained with the help of ray diagrams as follows. Large concave mirrors are used in field of solar energy to focus sun rays on objects to be heated. When parallel rays could be from a distant object incident on a concave mirror, the reflected rays converge to a focal point f, hence also called converging mirror. Image formation by concave mirrors richard fitzpatrick. 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. Object between infinity and centre of curvature c object at centre of curvature c object between centre of curvature c and principal focus f. Question 6 where should an object be placed in front of a concave mirror so as to obtain image beyond c. Concave mirror is also used by dentists, to see the large images of the teeth of patients. There are two alternative methods of locating the image formed by a concave mirror. Formation of image depends upon the position of the object.
The image produced by a concave mirror of a real object is a always real. Nature of images in a convex mirror and its applications. Images formed by concave mirror using ray diagram class. Apr 15, 2020 understanding concave mirror and image formation by it class 7 video edurev is made by best teachers of class 7. Concave mirror ray diagram, image formation, table teachoo.
These images are also termed virtual images because when they occur. A ray of light which run parallel to the principal axis, after reflection, passes through the principal focus f of a concave mirror, or appears to pass through the principal focus of a convex mirror. When parallel rays could be from a distant object incident on a concave mirror, the reflected. The image can be real or virtual, erect or inverted and magnified, diminished or of the same size as that of the object, all depending on the position of the object. Image formation in a convex lens can be explained with the help of three principal rays shown in the figure. The analytic method described below is far more flexible. Perhaps you noticed that there is a definite relationship between the image characteristics and the location where an object is placed in front of a concave mirror. The formation of images by spherical mirrors when an object is placed between the focal point f and a concave mirror, the image is virtual, upright, and magnified as in the case of images from flat mirrors, a virtual image is one from which light appears to be emanating but through which light does not pass, e. Flat mirrors spherical mirrors images formed by refraction thin. The image is real if the rays converge to the point and it is virtual if the rays do not meet it but appear to diverge from a point when the rays are produced backwards. Concave mirror image formation conditions, mechanism. Concave mirror image formation for each mirror and letter object below, construct ray diagrams for each marked dot to show the location and appearance of the image. Based on the law of reflection, three convenient ways of drawing reflected rays from a spherical mirror are established. The image formed by a concave mirror varies in size depending on the position of the object with respect to the mirror.
Does it differ from that seen in the image formed by the lens. To determine the focal length of a concave mirror by obtaining the image of a distant. Concave mirror convex mirror image formation by concave mirror concave mirror ray diagram image formation by convex mirror. Following are the rules which are used for obtaining images formed by spherical mirrors.
Therefore different types of images are formed when the object is placed 1. The imaging properties of a concave mirror are similar to that of a lens so we can repeat our procedure for sampling the relation between image and object distance. If the magnification produced by the mirror is 2, use mirror formula to determine the object distance, image distance and focal length of the mirror. If the object placed at the center of the mirror, image is also formed at center, real, inverted and with the same size as object. The formation of a virtual image using a convex mirror. Formation of convex and concave mirror class 7 notes edurev. The distance between the object and its inverted image formed by a concave mirror is 25cm. The image distance is the distance from the image to the mirror or lens.
Concave mirrors and convex mirrors image formation, ray. The graphical method described above is fine for developing an intuitive understanding of image formation by concave mirrors, or for checking a calculation, but is a bit too cumbersome for everyday use. Apr 24, 2019 image formed by a convex mirror let us perform an activity to understand the formation of an image by a convex mirror. Questions question 3 page 168 name a mirror that can give an erect and enlarged image of an object view answer ncert question 2 the image formed by a concave mirror is observed to be virtual, erect and larger than the object. Image formation by concave mirror ray diagram, chapter 10light, class 10th science. A mirror is a surface which reflects a clear image. A curved mirror formed by a part of a hollow glass sphere with a reflecting surface created by depositing silver metal is also referred to as a spherical mirror. Each mirror has a radius of curvature r which is in. The surface may be either convex bulging outward or concave.
The following table illustrates the image formed by a concave mirror for different positions of the given object. Image formation by a concave mirror for different positions of the object is shown below in the table concave mirrors are used as shaving mirrors, reflectors in car headlights, hand torch and table lamps. Image formation by spherical mirror in different cases introduction. Different types of images can be formed by a concave mirror by changing the position of the object from the concave mirror.
Rays emerging from a point meet at another point after reflection, and that point is called the image of the first point. Only consider rays making a small angle with the principal axis. Image formation in concave mirrors physics tutorials. Then well look at the algebraic descriptions of this geometry.
Image formation in concave mirrors while drawing images of the object we benefits from the special rays given above. Image formation by concave and convex mirror class 10. Principal c optical axis the center of curvature c is the center of the sphere. A concave mirror is used for image formation for different position of an object what inferences can be drawn about the following when an object is placed at a distance of 10 cm from the pole of a concave mirror of focal length 15cm a position of image bsize of image cnature of image. If the object placed at the center of the mirror, image is also formed at center, real. Draw a ray diagram to illustrate image formation in this case and also mark the distances on it. Image formation by convex and concave lens ray diagrams. Properties of the formed images by convex lens and concave. Question 1 mention few applications of convex mirror. Convex mirror is also known as diverging mirror and concave mirror is known as converging mirror. From mirror formula, we find that for a mirror of a fixed focal length f, as object distance u changes, image distance n also changes. Image formation by a convex mirror if the mirror is convex, so that r is negative, the resulting image is virtual that is, the image point is on the opposite side of the mirror. Question 5 where should an object be placed in front of a concave mirror so as to obtain image between f and c. Previously in lesson 3, ray diagrams were constructed in order to determine the general location, size, orientation, and type of image formed by concave mirrors.
Ray diagrams provide useful information about object image relationships, yet fail to provide the information in a quantitative form. Curvedspherical mirror a curved mirror is a mirror with a curved reflecting surface. Images formed by convex mirror using ray diagram 1 object is between infinity and pole a image is formed between pole and focus. Draw your rays lightly but visibly and mark your image points boldly. Images are formed at the point where rays actually intersect or appear to originate.
Understanding concave mirror and image formation by it. The use of these diagrams was demonstrated earlier in lesson 3. Image formed by concave mirror object at infinity a point object lying on. Question 4 write the applications of concave mirror. Spherical mirrors are of two types convex and concave. Ray diagrams can be used to determine the image location, size, orientation and type of image formed of objects when placed at a given location in front of a concave mirror.
Pdf an investigation of student understanding of the real image. Do this by repeating your measurements by placing the concave mirror at 810 locations along the bench. The concave lens is known as the diverging lens because it diverges the rays after they pass through it, the image formed by the concave lens is a virtual image because it can not be received on a screen. Question 2 the image formed by a convex mirror is seen to be erect,virtual and diminished. Virtual and real images were going to look at the behaviors of our three mirrors to learn the nature of the images they form as well as the geometry behind the image formation. Image formation by mirrors and lenses chapter outline 26. When parallel rays could be from a distant object incident on a fig. The physics classroom grants teachers and other users the right to print this pdf document and to download this pdf document for private use. Large concave mirrors are used to concentrate sunlight to produce maximum heat in the solar furnaces.
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