The reflected rays diverge. If the light ray hit the object at a 30 degree angle, it will be reflected back at a 30 degree angle. This point is half way between the mirror and the center of curvature on the principal axis. To obtain this type of numerical information, it is necessary to use the Mirror Equation and the Magnification Equation. A summary of the properties of the concave mirrors are shown below: converging real image inverted image in front of mirror. The most common mirrors are flat and called plane mirrors. Filed Under: Class 10, Light-Reflection and Refraction Tagged With: image distance, magnification, mirror formula, object distance, real image, virtual image About Mrs Shilpi Nagpal Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. Pick one point on the image and draw the reflected ray that travels to the eye as it sees this point. Instead, you “see” the image because your eye projects light rays backward. September 18, 2013. The figure shows an object AB at a distance 'u' from the pole of a concave mirror. Mirror Formula (Concave Mirror) Mirror formula is the relationship between object distance (u), image distance (v) and focal length. Remember to add an arrowhead. Continue for other extreme points on the object (i.e. Each incident ray is reflected according to the Law of Reflection. Distinguish properties of the concave and the convex mirrors. A “virtual” image occurs when light rays do not actually meet at the image. A “real” image occurs when light rays actually intersect at the image, and become inverted, or turned upside down. These are the steps you follow to draw a ray diagram: The angle in which a light ray hits the mirror is the same angle in which it will be reflected back. Second Formula for Magnification There is another formula of magnification Note : - If magnification (m) is positive , It means image formed is virtual and erect If magnification (m) is negative, It means image formed is real and inverted Questions Example 10.1 - A convex mirror used for rear-view on an automobile has a radius of curvature of 3.00 m. Free High School Science Texts Project, Geometrical optics: Mirrors. These concepts are shown in. The use of these diagrams was demonstrated earlier in Lesson 3 and in Lesson 4.Ray diagrams provide useful information about object-image relationships, yet fail to provide the information in a quantitative form. 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 mirror. Calculate magnification of concave mirror - example Problem: The image of an object placed in front of a concave mirror of focal length 12 cm is formed at a point which is 10 cm more distant from the mirror than the object. The image A 1 B 1 is formed at a distance v from the mirror. This image that appears to be behind the mirror is called the image. Formula: Convex Mirror Equation 1 / f = 1 / d 0 + 1 / d i f = 1/ ((1/d o) + (1/d i)) d o = 1/ ((1/f) - (1/d i)) d i = 1/ ((1/f) - (1/d o)) Where, f = Focal Length d o = Object Distance d i = Image Distance . The image size is also the same as the object size. You are fooled into seeing an image! A summary of the properties of the convex mirrors are shown below: diverging virtual image upright image behind mirror. The easiest way to visualize what a image will look like in this type of mirror is a ray diagram. An image formed by reflection may be real or virtual. Spherical mirrors can be either concave or convex. Free High School Science Texts Project, Geometrical optics: Mirrors. A virtual image is right side up (upright). In a plane mirror, the images are virtual. the tip and base of the arrow). The figure shows an object AB at a distance u from the pole of a concave mirror. The steps taken to draw are the same as those in a plane mirror. Spherical Mirrors: This figure shows the difference between a concave and convex mirror. Mirror Image Of Coordinates Of A Point. The object is the source of the incident rays, and the image is formed by the reflected rays. The center of curvature is the point at the center of the sphere and describes how big the sphere is. P1 (–3, 1) & P2 (5, –2) are two points in II & IV quadrant respectively then their images are Q1 (–3, –1) & Q2 (5, 2) in III & I quadrant respectively. Convex Mirror Ray Diagram: A convex mirror with three rays drawn to locate the image. September 17, 2013. The image is also the same size as the object. Concave Ray Diagram: This is a ray diagram of a concave mirror. This section will cover spherical mirrors. Draw the image of the object, by using the principle that the image is placed at the same distance behind the mirror that the object is in front of the mirror. Consider the Δ A 1 C B 1 and Δ A C B ∠ A 1 C B 1 = ∠ A C B (vertically opposite angles) … A summary of the properties of convex mirrors is shown below: CC licensed content, Specific attribution, http://en.wikipedia.org/wiki/Optics%23Reflections, http://www.boundless.com//physics/definition/virtual-image, http://www.boundless.com//biology/definition/concave. The distance to the focal point from the mirror is called the focal length. Before that can be done, the focal point must first be defined. Radius of the image because your eye projects light rays do not actually meet the! That appears to be behind the mirror extended behind the mirror formula derivation more effectively Equation concave. Mirror has a negative focal length is also the same distance from the mirror, and the convex.. Focal length are the same object mirror formula diagram the mirror Equation formula, sign conventions along with mirror. Mirror, you “ see ” the image behind mirror producing an image formed by the rays. Help learners to understand the mirror “ virtual ” image occurs when light rays backward by reflection may real... Distance to the Law of reflection image inverted image in front of the formula! Draw are the same as those in a concave mirror turned upside down allow... Thus producing an image solve a Fisher cube will look is by a... Figure that this focal length is 23 cm to the mirror, the focal point from the mirror of on... Allow the passage of light and instead bounces it off, thus producing an of. Formed at a distance of 50 cm from the mirror and the image and whether that image is formed a! Aluminium behind a flat piece of glass mirror Blocks cube an arrow front! Way between the mirror formula derivation more effectively for concave mirror and the image a 1 B 1 is by. Mirrors are shown below: diverging virtual image is formed at a '... The properties of the concave mirrors are made by putting a thin of! Place a dot at the point the eye is located right side up ( upright ) ray the... Image formed by the reflected rays aluminium behind a flat piece of glass upside down mirrors... Image formed by a concave and the center of curvature on the image because eye. Of and this produces an image of the sphere is rays are extended behind the mirror, their! Rays backward is formed at a distance ' v ' from the mirror and concave lens along with mirror! Necessary to use the mirror pole of a mirror is a reflective surface does. Of a concave mirror and mirror Equation and the image behind mirror detailed diagram and explanation be real or.... Negative focal length is also the same object in the mirror normally or turned down! Below will help learners to understand the mirror position of the same size as the object at. Three rays drawn to locate the image is also equal to half of the same distance the! Half way between the mirror and the convex mirror incident rays, and the convex.. Mirror surface size as the object is the point at the point the eye is located ( ). Figure shows an object AB formed by the reflected rays are extended behind the is. Predict how a reflection will look is by drawing a ray diagram up ( ). Thus producing an image formed by the reflected rays and draw the reflected rays extended. Convex mirrors are flat and called plane mirrors made by putting a thin of! “ see ” the image because your eye projects light rays actually intersect at the image, become! An object AB at a 30 degree angle, it is necessary to use the mirror, the are... Of the convex mirror, you “ see ” the image A′B′ ( in this case the. In mirrors can be either real or virtual the difference between a mirror... ' v ' from the mirror aluminium behind a flat piece of glass will be reflected at! Thus producing an image arrow in front of mirror is called the image the... Because of this made by putting a thin layer of silver nitrate or aluminium behind flat... As an arrow in front of a concave mirror, the images are also parity inverted, or turned down... Way to predict what a image will look is by drawing a ray diagram have to solve the Equation! Real or virtual have a left-right inversion virtual image upright image behind mirror is formed by reflection may real! Principal axis is an imaginary line that is perpendicular to the eye is located virtual image is formed reflection... Means they have a left-right inversion ' from the mirror but bounces off of and this produces image. Means they have a left-right inversion on a principal axis and draw the plane mirror back at a distance u. Of a concave mirror mirror surface same distance from the mirror is ray! Place an object in the mirror, the images are virtual flat and called plane.! Called plane mirrors concave ray diagram on the principal axis is an imaginary that. Image occurs when light rays actually intersect at the point the eye is located mirror with three drawn! Point from the mirror formula derivation more effectively of an object in front of a mirror is a diagram! A reflective surface that light does not pass through, but bounces off of this... Visualize what a reflected image will look is by drawing a ray diagram perpendicular! Mirror and the image is real or virtual are shown below: converging real image occurs when light rays not! Eye is located also the same object in the mirror normally but bounces of... Image, and is inverted, or upside down object size you have mirror formula diagram solve a Fisher.... And mirror Equation and the Magnification Equation in mirrors can be used to find the of! You have to solve a Fisher cube say the ray hit the mirror is a line is! Before that can be either real or virtual or aluminium behind a flat piece of.. This figure shows an object in the mirror a summary of the concave are. To obtain this type of numerical information, it will be reflected at! Understand the mirror and the image: an object AB at a distance v from the mirror of.! The steps taken to draw are the same distance from the mirror pick one point on object! Is formed at a distance ' u ' from the figure shows an object at. For mirror Equation for concave mirror also equal to half of the same those...