The mirror formula is applicable both in spherical mirrors (concave mirrors and convex mirrors) and in plane mirrors. h i = height of the image. Object distance is the distance of the object from the pole of the mirror; denoted by the letter u. The mirror equation expresses the quantitative relationship between the object distance (do), the image distance (di), and the focal length (f). Tests & Videos, you can search for the same too. The height of virtual images should be taken positive while the height of real images should be taken negatively. Magnification is also equal to the ratio of image distance to the object distance. The principal axis is taken as the x-axis of our coordinate system. Linear magnification when the image is real: As we normally take the object above the principal axis, therefore, h0 is always positive. Mirror Formula and Magnification - Light Reflection and Refraction, Class 10, Science | EduRev Notes notes for Class 10 is made by best teachers who have written some of the best books of Due to their converging property concave mirrors are also used as reflectors in automobiles head lights and search lights. The mirror formula is applicable for both, plane mirrors and spherical mirrors (convex and concave mirrors). To obtain this type of numerical information, it is necessary to use the Mirror Equation and the Magnification Equation. As we normally take the object above the principal axis, therefore, h, is always negative. It is the ratio of the height of the image to … Magnification is the increase in the image size produced by spherical mirrors with respect to the object size. This is The sign will automatically come up during calculations. Linear magnification when the image is real: You can also find Mirror Formula and Magnification - Light Reflection and Refraction, Class 10, Science | EduRev Notes ppt and other Class 10 slides as well. The real image is always inverted and is formed below the principal axis.Therefore, hi is always negative. ... Power of Lens and Magnification. It is the ratio of the height of the image to the height of the object and is denoted as m. The magnification, m produced by a spherical mirror can be expressed as: Here, h is the height of image and h’ is the height of the object. We can define two general types of spherical mirrors. It is used as rear-view mirror in vehicles. In convex mirror, the field of view is increased as compared to plane mirror. Let’s learn about formula and magnification produced by spherical mirrors. The water forms spherical droplets due to the influence of. Linear magnification produced by spherical mirrors : The ratio between the height of the image produced by the spherical mirror to the height of the object is called the linear magnification. Let’s learn about formula and magnification produced by spherical mirrors. using search above. A mirror formula can be defined as the formula which gives the relationship between the distance of object ‘u’, the distance of image ‘v’, and the focal length of the mirror ‘f’. b. The sign will be automatically appeared during calculations. It has gotten 31898 views and also has 4.7 rating. A real image can be taken on a screen, but a virtual image cannot be taken on a screen. Stay tuned with BYJU’S to learn more about spherical mirrors, surface tension and much more. A precision magnifier serves the role of a simple magnifier but holds multiple elements to erase aberrations and yield a sharper image. Concave mirrors give enlarged, erect and virtual image, so these are used by dentists for examining teeth. (ii) Do not put the sign of an unknown variable. The sign convention for spherical mirrors follows a set of rules known as the “New Cartesian Sign Convention”, as mentioned below: a. Class 10. depends only on the radius of mirror and is independent of wavelength of light and refractive index of medium so the focal length of a spherical mirror in air or water and for red or blue light is same. Magnification of a mirror, m = -v/u Where u= object distance, v = image distance and f = focal length Let's consider an example: A concave mirror has focal length 10 cm and object is placed at distance 15 cm from pole of mirror. Calculating magnification with the help of lens formula: Magnification of a lens is defined as the ratio of the height of an image to the height of an object. 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