Scribd is the worlds largest social reading and publishing site. Homework resources in mirrors and lenses physics science. Lenses remembering the basics of mirrors puts you half ways towards fully understanding lenses as well. Biconvex glass lens, spherical concave mirror, meter ruler, optical bench, lens holder, self. It is easiest to concentrate on only three types of imagesthen remember that concave mirrors act like convex lenses, whereas convex mirrors act like concave lenses. Use the mirror equations to determine location, size, orientation, and nature of images formed with. Stand with the toes of your shoes even with tape on the floor and look at your image in the plane mirror, then have your partner stand behind and to the side of the mirror so that their toes are right next to the image of your toes. Section summary the characteristics of an image formed by a flat mirror are. Plane and curved mirrors, lenses, ruler, optical bench. We use them every day and were never really surprised by what we see unless we happen to wake up to a particularly impressive case of bed head.
In this science printable, students will also define hyperopia and myopia and identify the type of lens used to correct each condition. Mirrors and lenses physics science homework resources. Just how much do you know about the different types of lenses and mirrors. In addition, for spherical mirrors the focal length is half the radius of curvature of the reflecting surface. The distance between the focal point and the lens is 8. Reflection from spherical mirrors kindle education. Apply the thinlens equation and the mirror equation to determine the focal length of a converging lens and mirror. Most mirrors used commercially are made of glass, with the rear surface silvered and then coated with a layer of paint or lacquer for protection. In principle, electromagnetic waves may have any wavelength, from zero to arbitrarily long. The primary goals are to understand the relationship between. Mirrors are used widely in optical instruments for gathering light and forming images since they work over a wider wavelength range and do not have the problems of dispersion which are associated with lenses and other refracting elements.
Find materials for this course in the pages linked along the left. The same strategies are valid for mirrors as for lenses with one qualificationuse the ray tracing rules for mirrors listed earlier in this section. Using a ruler or other straight edge and the ray tracing methods described in this section, locate and draw the image of the pencil. Types of mirrors figure 1 shows the three types of mirrors we will consider. It bends light further away in the middle, more like the inside of a bowl. 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. Ordinary mirrors reflect light over a broad range of frequencies, but a new mirror design can reflect a single frequency while allowing all others through. What are the differences between real and virtual images. As of 2010, mirrors and lenses are so prevalent that most people use them every day, regardless of whether or not they consciously perceive the use.
Finally, the magnification of a mirror or lens is given by the formula hh ss. Because none of the rays actually emanate from the image, it is called a virtual image. They form an enlarged, upright image of a persons face so it is easier to see small details. Note the location, orientation upright or inverted, relative size larger or smaller than object. Youngs doubleslit diffraction experiment for light and some laser tricks, too doc physics duration. If a light ray strikes a plane mirror at an angle of 61 degrees from the normal, the reflected ray will be. Keep in mind that for an object to be considered a lens it must be made of a transparent material that has an index of refraction higher than air. Plane mirrors produce rightleft reversed images of objects. But when we look at mirrors with our physics eyes, they become both mysterious and surprising.
Each point of an illuminated object emits a continuum of light rays in a range of directions. Physics mirrors are where light can be reflected and reconvened to form images. Objects inside focal length of curved mirrorsimage distance in the two situations shown, the mirrors have the same focal lengths, and the object distance from the mirror to the arrow is the same. The goal of the experiment is to be able to analyze ray diagrams so as to determine fundamental properties of image formation. Mirrors dont have to be flat, like the circus hall of mirrors mirrors which may improve uncle festers appearance. May 07, 2020 just how much do you know about the different types of lenses and mirrors. The image distance for a plane mirror is always equal to the object distance because the magnification is 1.
The purpose of this lab is to introduce students to some of the properties of thin lenses and mirrors. Shaving mirrors and makeup mirrors are also concave mirrors. For each object position, answer the following questions about the. Two different types of mirror are concave and convex mirror with different properties. The incoming angle, called the angle of incidence, is always equal to the angle leaving the surface, or the angle of reflection. To get credit for this activity, you must show your answers to a plc tutor and have them initial the signout sheet before 4. Should that not be a minus sign on the left hand side. Image formation by mirrors and lenses physics courses. The terms concave and convex are from the perspective of the object. There are two types of lenses, and they each change the perspective of how things look. Choose your answers to the questions and click next to see the next set of questions.
When light falls on a highly polished surface like a mirror most of the light is sent back into the same medium. After using reference materials to answer questions about lenses and mirrors, students will label each shape as convex or concave. Mirrors and lenses reflection we describe the path of light as straightline rays reflection off a flat surface follows a simple rule. Or should it be a plus sign for mirrors and minus for lenses. If you are 3 m in front of the mirror, your reflected image will be located 3 m behind the mirror. Optics usually describes the behaviour of visible, ultraviolet, and infrared light. The most common nonplane mirrors are spherical mirrors, shaped like a bowl with the reflecting material on either the inside of the bowl or the outside. For plane mirrors, the reflected image a virtual image and object are along the same line, perpendicular to the reflective surface.
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Image formation in a concave mirror place an object before a concave mirror for each of the following object positions shown below and obtain its image. Learn vocabulary, terms, and more with flashcards, games, and other study tools. To the eye, the ray seems to come from behind the mirror. A light beam source, in air, is incident on a substance of unknown index of refraction. When light falls on a highly polished surface like a. Your image appears to be the same distance behind a mirror as you are in front of it. Jun 16, 2016 in this video i will introduce the objects, focal points, images of the converging and diverging lenses, and concave and convex mirrors. All of them are segments of spheres centered on a horizontal axis.
This type of mirror will produce only smaller and virtual images. Mar 06, 2015 ordinary mirrors reflect light over a broad range of frequencies, but a new mirror design can reflect a single frequency while allowing all others through. Concave mirrors and convex mirrors image formation, ray diagram. The purpose of the lab is to test the predictions made by the ray diagrams and thin lens equations for real images produced by a converging lens and mirror. Sells, elementary classical physics allyn and bacon, boston, 1973, second edition, vol.
Drawing the ray diagrams is an ideal way to illustrate the formation of images by spherical mirrors. This metamirror, an array of subwavelength pieces of shaped metal embedded in a transparent medium, can also be made to reflect light in a chosen direction or focus it like a curved. In the two situations shown, the mirrors have the same focal lengths, and the object distance from the mirror to the arrow is the same. In order to understand mirrors, we first must understand light. An object of height 8 centimeters is placed 45 centimeters to the left of the lens. The intersection of at least two reflected rays give the. Real image is formed when the light reconvenes and always inverted i. Biconvex glass lens, spherical concave mirror, meter ruler, optical bench, lens holder, selfilluminated object generally a vertical arrow, screen. App file and enter the values for the object and image distances.
When light hits a surface at a low angle like on a lake at. In this video i will introduce the objects, focal points, images of the converging and diverging lenses, and concave and convex mirrors. Mirrors and lenses both have the ability to reflect or refract light. General physics ii course lecture notes section xii. Geometric optics and introduction to interference ch. Unscramble the shaded letters to find the name of the man who placed a mirror on the moon so that scientists can measure its distance from the earth. A ray of light from the top of the chess piece reflects from the mirror. This property has put mirrors and lenses in use for centuries. The image and object are equidistant from the mirror. It curves light away from its middle, like the outside portion of a bowl. Lenses and mirrors activity after using reference materials to answer questions about lenses and mirrors, students will label each shape as convex or concave. Two types of image formed by mirrors are real image and virtual image.
Because light is an electromagnetic wave, other forms of electromagnetic radiation such as xrays, microwaves, and radio waves. The reflection from a plane mirror is a good example of a virtual image. 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. There are two types of curved mirror convex and concave. Plane mirrors science and mathematics education research group supported by ubc teaching and learning enhancement fund 20122014 department of curriculum and pedagogy a place of mind f a c u l t y o f e d u c a t i o n. We use your linkedin profile and activity data to personalize ads and to show you more relevant ads. This is a zipped folder containing a pdf and an editable version of each of the following. Spherical mirrors problems the physics hypertextbook. How can you tell by looking whether an image formed by a. Circle the letter of each sentence that is true about plane mirrors. In both cases, the object distance is less than the focal distance.
Light rays reflect from a mirror at an angle that is twice as large as the angle of incidence. 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. Learn and lenses physics mirrors with free interactive flashcards. Stay tuned with byjus to know more about concave convex mirrors, plane mirrors and much more.
Lenses and mirrors activity physics printable 6th12th. The same sort of rules apply, just with a few modifications. Choose from 500 different sets of and lenses physics mirrors flashcards on quizlet. Real images can be formed by concave, convex and plane mirrors d real images result when the reflected light rays diverge.
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