Physics Optics Concave Convex Mirrors Concave Mirrors and Convex Mirrors A mirror is a surface that reflects almost all incident light. Mirrors come in two types: those with a flat surface, known as plane mirrors, and those with a curved surface, called spherical mirrors. The method is applied to the task of drawing a ray diagram for an object located beyond the center of curvature (C) of a concave mirror. Yet the same method works for drawing a ray diagram for any object location. 1. Pick a point on the top of the object and draw two incident rays traveling towards the mirror.
PPT Chapter 34B Reflection and Mirrors II (Analytical) PowerPoint
A ray approaching a concave converging mirror parallel to its axis is reflected through the focal point F of the mirror on the same side. (See rays 1 and 3 in Figure \(\PageIndex{2}\)) A ray approaching a convex diverging mirror parallel to its axis is reflected so that it seems to come from the focal point F behind the mirror. Spherical mirrors may be concave (converging) or convex (diverging). The focal length of a spherical mirror is one-half of its radius of curvature: \(f = \frac{R}{2}\).. If the inside surface is the reflecting surface, it is called a concave mirror. Symmetry is one of the major hallmarks of many optical devices, including mirrors and lenses. Concave (converging) mirror b. Convex (diverging) mirror F F. Brooklyn College 2 For spherical mirrors, relation between object distance (d o), image distance (d i) and focal length (f) is given by mirror equation d o d i f 1 1 1 (3) where d o, d i and f are measured from the mirror on the principal axis.. The focal length f of a concave mirror is positive, since it is a converging mirror. Figure 25.39 (a) Parallel rays reflected from a large spherical mirror do not all cross at a common point. (b) If a spherical mirror is small compared with its radius of curvature, parallel rays are focused to a common point.
Rules for drawing Ray Diagram in Convex and Concave Lens Teachoo
A ray approaching a concave converging mirror parallel to its axis is reflected through the focal point F of the mirror on the same side. (See rays 1 and 3 in Figure 2(b).) A ray approaching a convex diverging mirror parallel to its axis is reflected so that it seems to come from the focal point F behind the mirror. (See rays 1 and 3 in Figure 3.) Figure 25.26 Sunlight focused by a converging magnifying glass can burn paper. Light rays from the sun are nearly parallel and cross at the focal point of the lens. The more powerful the lens, the closer to the lens the rays will cross. The greater effect a lens has on light rays, the more powerful it is said to be. Figure 25.6.5: Thin lenses have the same focal length on either side. (a) Parallel light rays entering a converging lens from the right cross at its focal point on the left. (b) Parallel light rays entering a diverging lens from the right seem to come from the focal point on the right. The concave lens is a diverging lens because it causes the light rays to bend away (diverge) from its axis. In this case, the lens has been shaped so all light rays entering it parallel to its axis appear to originate from the same point, F, defined to be the focal point of a diverging lens.
Explain the rules of concave and convex mirror
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 purpose of this portion of the lesson is to summarize these object-image relationships - to practice the L•O•S•T art of image description. Check Your Understanding. The following questions pertain to the image characteristics of all types of optical devices discussed in the last two units - plane mirrors, concave mirrors, convex mirrors, converging lenses, and diverging lenses.Use your understanding of the object-image relationships for these three types of mirrors and two types of lenses to answer these questions.
thinner in the center. there are focal points on both sides of each lens. focal length f on both sides is the same. Ray diagram for converging lens. Ray 1 is parallel to the axis and refracts through F. Ray 2 passes through F' before refracting parallel to the axis. Ray 3 passes straight through the center of the lens. A convex mirror diverges light, as does a concave lens. Any lens that is thicker in the center than the ends is a convex lens. Any lens thicker at the ends than in the center is a concave lens. Similarities between lenses and mirrors. The equations we used for mirrors all work for lenses. A convex lens acts a lot like a concave mirror.
Concave lens — Science Learning Hub
Principal Ray 1: a ray approaching a concave converging mirror parallel to its axis is reflected through the focal point F of the mirror on the same side. (See rays 1 and 3 in Figure \(\PageIndex{2}\)(b).); a ray approaching a convex diverging mirror parallel to its axis is reflected so that it seems to come from the focal point F behind the. DEIB in STEM Ed. Donate. How does a lens or mirror form an image? See how light rays are refracted by a lens or reflected by a mirror. Observe how the image changes when you adjust the focal length of the lens, move the object, or move the screen.
