Concave mirrors bend inward, while the curvature of a convex mirror is outward. Concave and convex mirrors lab part 1 find the focal. If you can use the same format i did ill give 5 stars. This interactive animation shows that indeed, a concave mirror does produce an image of an object in front of it. This is a great way to introduce curved mirrors to students, and have them investigate what they do for themselves. Move the object, the candle, with your mouse to explore how the location and the size of. Description simulation of image formation in concave and convex mirrors.
Your class will have fun learning about the way images are distorted in different mirrors in this lesson. The terms concave and convex are from the perspective of the object. A curved mirror is a mirror with a curved reflecting surface. A spherical mirror whose reflecting surface is curved outwards, is called a convex. With spherical mirrors, reflection of light occurs at a curved surface.
Figure 315 defining points for concave and convex mirrors. Convex mirrors are used in many department stores and offices, most often placed in the corners of rooms, so that more of a particular room area may be seen at the same time. Curved mirrors, ray diagrams, and simulations background information spherical mirrors may be concave or convex. All of them are segments of spheres centered on a horizontal axis. For those who dont know lost is location orientation size and type for example. Reflection and the ray model of light lesson 4 convex mirrors. A concave mirror collects light from a distant star. The concave mirror is a converging mirror, so that it is used for many purposes, it is used as a torch to reflect the light, it is used in the aircraft landing at the airports to guide the aeroplanes, it is used in shaving to get an enlarged and erect image of the face. We would like to suggest that you combine the reading of this page with the use of our.
The most common nonspherical type are parabolic reflectors, found in optical devices such as reflecting telescopes that need. Feng shui ba gua mirrors are one of best known feng shui symbols of protection. A light ray parallel to the principal axis is reflected through f notice how all the rays converge at f thats why concave mirrors are also known as converging mirrors. An image formed by a concave mirror, based on an objects distance from the mirror and the mirror s focal length skills practiced this quiz and worksheet allow students to test the following skills. Mirror example consider a concave mirror radius 10 cm then cm. In this equation, the symbols d o and d i represent the distances from the mirror to the object and to the image. This activity leads students through a practical investigation to find out what concave and convex mirrors do to light rays. A concave mirror is a curved mirror that bulges inward. For converging mirrors and diverging mirrors, the focal length is equal to onehalf the radius. A concave mirror is that spherical mirror in which the reflection of.
Concave and convex mirrors lab part 1 find the focal length of your concave mirror 0. For plane mirrors, the object distance equals the image distance and all images are erect and virtual. Three types of mirrors are plane mirrors, concave mirrors and convex mirrors. We would like to suggest that you combine the reading of this page with the use of our optics bench interactive or our name that image.
The cartesian sign convention is used here using a ray parallel to the principal axis and one incident upon the center of the mirror, the position of the image can be constructed by backprojecting the rays which reflect from the mirror. Parallel and focal point, focal point and parallel, centre of curvature. The differentiated worksheets guide the children through an investigation of how convex and concave mirrors change the size of an objects image. A light ray parallel to the principal axis is reflected through f h c c f h f h c c f f h 14.
Searchlights, floodlights, car headlights, dentists mirror. Graphical or ray tracing techniques represent an easy and popular method for determining the position of images formed by a mirror. Draw line from object top q to mirror parallel to axis ray 4. This optical phenomenon may account for the mirror s location in the entrance hall in an inventory prepared shortly after jeffersons death. They also cause images to become larger when viewed from close up. The location of images produced by spherical mirrors can be determined experimentally, graphically, or through applying geometric formulas. Applications of concave mirrors solar concentrator makeup.
Comparing concave and convex mirrors we compare concave mirrors with convex mirrors pointwise. Applications of convex mirrors microscope under vehicle search mirrors rear view mirror security at hospitals, shopping areas at blind turns what is the convex mirror used on roads called. For the love of physics walter lewin may 16, 2011 duration. Figure 1 shows the three types of mirrors we will consider. Can combine lenses to give combination effective focal length fe. If your tooth is inside the focus, the image is magnified and upright. Concave mirrors are used in car headlights, in dentists offices and in. Concave mirrors sometimes referred to as converging mirrors are used all around us to reflect, focus and redirect light or otherelectromagnetic waves such as a laser at a store checkout or the mirror used in a reflecting telescope or a microwave.
Concave mirrors are silvered on the inside of the sphere and convex mirrors are silvered on the outside of the sphere. A concave mirror a concave mirror has a shape with a thinner middle and thicker sides in relation to a flat plane. The mirror is believed to reflect back the bad energy against your house. They determine if images are real or virtual, if they are upright or inverted, the focal length of the. When a viewer stands outside the focal point of a concave mirror, his image is reflected upside down.
Difference between concave mirror and convex mirror. Concave mirrors have the focal point f in front of the mirror, and convex mirrors have the focal point behind the mirror. The plane mirror is a flat surface, where the object reflected has an image the same size. A ray diagram shows the path of light from an object to mirror to an eye.
Reflection and the ray model of light lesson 3 concave mirrors. Curvedspherical mirror a curved mirror is a mirror with a curved reflecting surface. Frankl your own mind is a sacred enclosure into which nothing harmful can enter except by your promotion. A spherical mirror, whose reflecting surface is curved inwards, that is, faces towards the centre of the sphere, is called a concave mirror. Objects reflected in concave mirrors often appear bigger than they really are, although the specifics of how the image appears depends upon the objects distance from the mirror. We deliver all major cities in australia melbourne, sydney, brisbane, adelaide, gold coast qld. Concave mirrors have a curved surface with a center of curvature equidistant from every point on the mirror s surface. In this spherical mirrors worksheet, students answer 14 questions about convex and concave mirrors and the images formed in each. Fun house or carnival mirrors combine concave and convex mirror shapes to distort images in amusing ways.
This interactive tutorial explores how moving the object farther away from. A mirror that bulges inwards is called a concave mirror. Most curved mirrors have surfaces that are shaped like part of a sphere, but other shapes are sometimes used in optical devices. If a concave mirror is thought of as being a slice of a sphere, then there would be a line passing through the center of the sphere and attaching to the mirror in the. Presented in figure 4 are parallelray traces indicating the principal rays and location of an image formed by a concave. A concave mirror has a radius of curvature of 4 meters. Concave spherical mirrors florida state university. All images formed from convex mirrors are erect, virtual, and diminished in. Concave and convex mirrors unlike light rays hitting a flat mirror, parallel light rays reflecting off a curved mirror do not move in the same direction.
An object beyond the center of curvature forms a real and inverted image between the focal point and the center of curvature. In a convex mirror, parallel light rays move away from each other, as. The reflecting mirror of a compound microscope would be placed at the focal point of the mirrors. They will then find out how arthur james wilson, a famous scientist, made his fortune by using convex mirrors to create car wing mirrors. If i combine 2 of such convex lenses, how does the image of the 1st lens act. Set up equipment in accordance with teacher example and figure 2 your mirrormeter stick assembly will be on one side of the room and the light source will be on the other. Concave images concave mirrors reflect images upside down when viewed from afar. How far from the mirror is the image of the star if the radius of curvature is 124 cm. Explain why the light beams are reflected this way using the law of reflection.
The surface may be either convex bulging outward or concave recessed inward. Various terms associated with spherical mirrors spherical mirror. Move the arrow to the right side of the mirror to get a convex mirror. Different types of images can be formed by a concave mirror by changing the position of the object from the concave mirror. Convex mirrors show things the right way up and usually smaller. Therefore different types of images are formed when the object is placed. The mirror of concave is in that looks like a bowl. Move the tip of the object arrow or the point labeled focus. A mirror is curved outward, like the bottom of a spoon. 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. The concave mirrors, curved as the inside of a bowl, are used for focusing light, and the images often appear larger and. 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. Snc 2d light and geometric optics concave mirrors extra practice worksheet a draw a ray diagram for each to locate the image.
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