The reciprocal of the focal length, 1f, is the optical power of the lens. Images are formed of an object placed in front of these lenses as a result of the refraction of light between the lens and the surrounding medium. When the object is inside the focal point the image becomes virtual and upright. Lenses ppt lens optics lenses free 30day trial scribd. Converging and diverging lenses 1 2275 speedway, mail code c9000 austin, tx 78712 512 4715847 i. Basic knowledge of converging and diverging lenses. For now, internalize the meaning of the rules and be prepared to use them. Lenses an application ofrefraction there are 2 basic types of lensesa converging lens convex a diverging lens concave takestakes light rays and bring light rays and spreads themthem to a point.
The word lens comes from lens, the latin name of the lentil, because a doubleconvex lens is lentilshaped. Needless to mention, the image formation procedure is completely distinct for the two. Worksheets are diverging converging lens work, holt physics diagram skills thin lenses answers pdf, chapter 10 thin lenses, converging diverging lenses ray diagrams, the lens equation, thin lens and magnification equations work, physics 11 05 image formation by lenses name lenses, chapter 2 lens and mirror calculations. B a diverging lens always produces an image that is larger than the object. Converging and diverging lenses 6 2275 speedway, mail code c9000 austin, tx 78712 512 4715847 i. Find the location, nature, and magnification magnification of images formed by converging and diverging lenses. The focal length f is positive for converging lenses, and negative for diverging lenses. The types and uses of lenses in our life science online. Difference between converging and diverging lens compare. This is meant as an introductory worksheet into lenses and mirrors.
Diverging lenses are thinner in the middle, and they deflect light rays away from the axis. The ray diagram constructed earlier for a diverging lens revealed that the image of the object was virtual, upright, reduced in size and located on the same side of the lens as the object. Converging lenses are divided into three cases, which depend on the source location. The foregoing objects are basically accomplished by an intraocular lens adapted to be implanted in the eye, and used with an external converging spectacle lens to provide a magnified retinal image of a given object comprising an optical element having a first portion and a second portion, the first portion including a diverging lens, and the. The focal point is denoted by the letter f on the diagrams below.
If the light rays diverge as in a diverging lens, then the diverging rays can be traced backwards until they intersect at a point. They determine how far the image is from the lens, they determine if the image is upright or inverted and they. This happens to converging lenses when the object is placed between the lens and the principle focus. Snells law and refraction principles are used to explain a variety of realworld phenomena. Chapter assessment 30justinna licea flashcards quizlet. Aconverging lens, also known as a convex lens,is thicker in the middle. Diverging lens spreads out the light rays travelling through it. The lateral magnification of the mirror or lens is the ratio. Pdf optical images due to lenses and mirrors researchgate. Converging lens converge and focus the light ray to meet at a single point whereas diverging lens, diverge the light falling on its surface and not meet at a single point. Describe the nature of the images using the following words. It simply has space to define some key terms associated with lenses and mirrors concave, convex, reflection, refraction, converging, diverging, real image, virtual image as well. We will start by considering how light emission can be explained using a quantum model of atomic excitation, and.
The light passes through the diverging lens and on to a converging lens of focal length 10 cm that is 5 cm from the diverging lens. If youre behind a web filter, please make sure that the domains. Ray diagram practice concave mirrors displaying top 8 worksheets found for this concept some of the worksheets for this concept are ray diagrams for concave mirrors, converging diverging lenses ray diagrams, mirror ray diagram work answers, ray diagrams, ray diagrams for convex mirrors, physics, 1 1 1 h d i i in every problem draw a ray i o. Be sure you understand the sign conventions for do, di, f and m. Converging lens is convex lens whereas diverging lens is a concave lens. If youre seeing this message, it means were having trouble loading external resources on our website. The distances from the lens to f and f are the same focal length f of the lens. Distinguish between the focal point and focal plane of a lens. Showing top 8 worksheets in the category concave and convex lenses. Converging or double convex lenses take an initially parallel beam of.
Converging and diverging lenses flashcards quizlet. In general those that are thicker near the edges are diverging and those that are thicker near the center are converging. The goal of the experiment is to be able to analyze ray diagrams so as to determine fundamental properties of image formation. Describe the shapes of three typical converging positive thin lenses and three typical diverging negative. Spherical mirrors and lenses ray tracing for lenses. Other than the basic structural variations between concave mirrors and diverging lenses, the main difference lies in the fact that the former works by the principle of reflection while the latter utilizes that of refraction. If we apply the laws of refraction to two prisms, the rays bend toward the base, converging light. They are separated by a distance d which is greater than f, as shown. Worksheets are diverging converging lens work, concaveconvex s1 identifying shapes, converging diverging lenses ray diagrams, name box score date ap physics work 14 chapter 24, refraction convex and concave lenses, exploration of optics converging and diverging lenses. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Main features of a thin converging lens optical centre for a symmetrical lens, this is the point midway between the lens surfaces on its principal axis.
Converging lenses page 497 diverging lenses page 498 when light passes at an angle to the normal from one material into another material in which its speed is lower. In our class, we study two different types of lenses. A 2cm tall object is located 15cm from the 40cm focal length lens as shown in the figure. Converging lenses as long as the object is outside of the focal point the image is real and inverted. The center of the curvature of the lens face c is the center of the sphere, where this face is a part of it, the optical center of the lens is a point inside the lens lies on the principal axis in the mid. Convex converging and concave diverging lenses are drawn as, v w to understand image formation we use ray diagrams. The ray nature of light is used to explain how light refracts at planar and curved surfaces. Oct 03, 2014 homework statement a diverging lens f.
Furthermore, during the convex lens experiment in test 1, the participants found that the. Diverging lenses the image is always virtual and is located between the object and the lens. Optical centre main features of a thin converging lens. Concave lenses concave lenses always produce upright, virtual images. Advanced knowledge of converging and diverging lenses. These two rules will greatly simplify the task of determining the image location for objects placed in front of converging lenses. They determine how far the image is from the lens, they determine if the image is upright or inverted.
Apr 28, 2008 a a converging lens with a focal length of 15cm has an object 5cm tall placed 40cm to the left of it. Previously in lesson 5, ray diagrams were constructed in order to determine the location, size, orientation, and type of image formed by double concave lenses i. In this thin lens worksheet, high schoolers answer 20 questions about the images produced by converging lenses and diverging lenses. Shapes of lenses the shape of a lens can be understood by con sidering a lens to be a large number of portions of prisms, as shown. Images tracing points draw an arrow to represent the location of an object, then draw any two of the rays from the tip of the arrow. Some of the worksheets for this concept are diverging converging lens work, concaveconvex s1 identifying shapes, converging diverging lenses ray diagrams, name box score date ap physics work 14 chapter 24, refraction convex and concave lenses, exploration of optics converging and diverging lenses. Earlier in lesson 5, we learned how light is refracted by double concave lens in a manner that a virtual image is formed. In the problems you encounter, the object will either be. Note that a converging lens has a thicker waist, whereas a diverging lens has a thinner waist. Converging and diverging lenses in a lab practice khan. The location of the final image formed by the action of a converging lens and a diverging lens is found by ray tracing and by calculation using the equation for a thin lens.
Light parallel to the principal axis a converges toward f after reflection from a concave mirror, and b diverges from f after reflection from a convex mirror. Demonstration of converging and diverging action of lenses example use a card board ready made shirt box like the one used to study the laws of reflection using a comb and torch. Displaying top 8 worksheets found for concave and convex lenses. Principles lenses follow the same rules as mirrors. A lens forms an image by bending rays of light that pass through it. Diverging and converging a diverging lens with a f.
The socalled nimrud lens is a rock crystal artifact dated to the 7th. This topic will be discussed in the next part of lesson 5. While diverging lenses always produce virtual images, converging lenses are capable of producing both real and virtual images. Ray diagram practice concave mirrors worksheets kiddy math.
Section iii will provide an overview of the laser itself. Which of the following statements are true for images formed by thin lenses. If the thickness of the lens is much less than the distance from the lens to each focal point. Converging lens and diverging lens are one way of classifying lenses based on the behavior of the light affected by the lenses. Worksheets are diverging converging lens work, holt physics diagram skills thin lenses answers pdf, chapter 10 thin lenses, converging diverging lenses ray diagrams, the lens equation, thin lens and magnification equations work, physics 11 05 image formation by lenses name lenses, chapter 2 lens and. Use the slider to switch between converging and diverging lens. An introduction to laser technology and its applications. Most camera lenses consist of a converging lens followed by an diverging lens followed by a second converging lens. Since kellys eyeglasses have a positive focal length, they must be converging lenses and frays are diverging. Jun 28, 2012 converging lens and diverging lens are one way of classifying lenses based on the behavior of the light affected by the lenses. On a bright sunny day take the converging lenses outside and try focusing the sunlight onto a piece of paper. Some of the worksheets displayed are diverging converging lens work, concaveconvex s1 identifying shapes, converging diverging lenses ray diagrams, name box score date ap physics work 14 chapter 24, refraction convex and concave lenses, exploration of optics converging. This pdf book contain converging and diverging lenses packet answers document.
Both converging lenses and diverging lenses are very important in the understanding of optics and other related fields. For aconcave lens, the lens equation is the same but the value of fis nownegative. For a diverging lens, the image is always virtual, diminished, and upright, as illustrated in the following diagram. Students will also note the orientation of the object and image. Any lens that makes a real image that can be seen on a screen is a converging lens example problem. Displaying all worksheets related to concave and convex lenses. Find several lenses and determine whether they are converging or diverging. Any incident ray traveling parallel to the principal axis of a diverging lens will refract through the lens and travel in line with the focal point i. Light passes through the first lens and through the diverging lens, which flips the inverted image. To the right, 30 cm away, is a converging lens of focal length 10cm.
Geometrical optics, image formed by converging and. In this thin lens worksheet, students answer 20 questions about the images produced by converging lenses and diverging lenses. You can work out the factor of magnifications by dividing the image height by the object height. Converging and diverging lenses thin lenses are devices whose centers are very thin. Two converging lenses with focal lengths of 40cm and 20cm are placed 10cm apart. Mar 24, 2007 a diverging lens f 10 cm is located 20. Diverging and converging a diverging lens with a focal length of 20 cm and a converging lens with a focal length of 17 cm have a common central axis. Alens is a piece of glass or plastic that refracts light. We also learned about three simple rules of refraction for double concave lenses. Converging lenses gcse physics doodle science youtube. Is the lens in the projector a converging lens or a diverging lens a converging lens. C a diverging lens always produces an upright image of an object placed in front of it. If the focal length is in metres, this gives the optical power in dioptres inverse metres. Convex converging and concave diverging lenses are drawn as.
A converging lens is a lens that converge a beam of light to a point whereas diverging lenses make. A lighted candle is placed 36 cm in front of a diverging lens. Where these three rays converge or seem to converge, is the corresponding point on the image. The first lens controls the magnification level of the image by moving toward or away from the object. As shown above, real images are produced when the object is located a distance greater than one focal length from the lens.
The final image is real, inverted, and 22 cm beyond the converging lens. Aug 26, 2009 when light is coming to a diverging lens, regardless of the pattern the light from the light source makes diverging from a point, converging from a point or coming in parallel rays, the diverging lens will always make it more divergent, right. Determine the distance of the final image relative to the converging lens homework. Dec 25, 2016 this sets shows the behaviour of light as it passes through. Diverging lens find the focal length of a converging lens by holding it up to a window. Converging and diverging liquid crystal lenses oral paper. Determine the distance of the final image relative to the converging lens.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. Apply the lensmakers equation s equation to find parameters related to lens construction. If the source is more than two focal lengths away from the lens, we see that the image is inverted, diminished, and real. Converging and diverging lens are shown in the figure. Pdf converging and diverging liquid crystal lenses oral paper. These can be used in applications when all intensity. Lenses converging lens diverging lens structure thicker in the middle thinner in the middle use converge. Homework statement a converging lens has a focal length f, and a diverging lens has a focal length f, which has the same magnitude as the converging lens. You can change the focal width as well as the object distance by dragging the points f and g respectively and you can change the size of the object by dragging point d. Converging lens converge and focus the light ray to meet at a single point whereas diverging lens, diverge the light falling on its surface and not meet at. The converging lens is thicker at its center than at its edge. Us4666446a intraocular lens with converging and diverging. This intersection point is known as the focal point of a diverging lens. Lenses are present in most of optical devices such as telescopes, microscopes, camera lenses, binoculars etc some lenses are called thin when their thickness is much less than their diameter.
Ray diagrams concave mirrors ray diagrams concave mirrors. A convex or converging lens is shaped so that all light rays that enter it parallel to its optical axis intersect or focus at a single point on the optical axis on the opposite side of the. Parallel rays, however, do not converge to a focus, leaving images distorted and unclear. To download free ray diagrams for concave mirrors you need to register.
The lentil plant also gives its name to a geometric figure some scholars argue that the archeological evidence indicates that there was widespread use of lenses in antiquity, spanning several millennia. Geometric optics converging lenses and mirrors physics lab iv objective in this set of lab exercises, the basic properties geometric optics concerning converging lenses and mirrors will be explored. The concave lens is thin at its center and more thick at the tips, it separates the light rays, so, it is called the diverging lens special concepts related to the lenses. Converging and diverging lenses preparation for this weeks experiment read about the thin lens equation for converging and diverging lenses. Converging and diverging behaviour definition if refracted rays converge to a single point after refraction, then this is called as converging behaviour of the lens.
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