A real, inverted, enlarged image is formed beyond C, in front of the concave mirror. Rear view mirrors of vehicles and the ones used in ATM centres. ii . Concave mirrors converge the light incident on them and hence are called converging mirrors. Questions Example 10.1 - A convex mirror used for rear-view on an automobile has a radius of curvature of 3.00 m. If a bus is located at 5.00 m from this mirror, find the position, nature and size of the image View Answer Example 10.2 - An object, 4.0 cm in size, is placed at 25.0 cm in front of a concave mirror of focal length 15.0 cm. We love to hear your thoughts about this post! Object between C and F Since the outer surface is a convex surface, the mirror so formed is called a convex mirror. Principal focus (F) is the point on the principal axis, where a parallel beam of light, parallel to the principal axis after reflection converges in the case of a concave mirror and appears to diverge from in the case of a convex mirror. Curved mirrors. Spherical mirrors can be further classified into the following two types as arrow_back Spherical Mirrors. Light Class 8 Science Chapter 16 as per NCERT Book used in CBSE and other Schools. The first mirrors used by humans were most likely pools of water. Thus, as the object approaches the mirror, the image approaches the mirror too but not proportionately. Radius of curvature (R) is the radius of the sphere, of which the mirror is a part. Object beyond C The image formed by a convex mirror is always erect, virtual, and diminished in size. Light Class 8 Extra Questions Short Answer Questions. What is reflection? Search for courses, skills, and videos. We can observe ourselves magnified when the mirror is placed close to our face. ENT doctors use them for examining the internal parts of the ear, nose and throat. The images formed by convex mirrors are always diminished, virtual and erect, irrespective of the position of the object. The images formed by convex mirrors are always diminished, virtual and erect, irrespective of the position of the object. There are two types of spherical mirrors: concave and convex mirror.In this article, we will be studying the spherical mirrors structure and its different types in detail. 8: Spherical mirror 9. inverted 10: Screen 11: Concave 12: Virtual and Enlarged . Irrespective of the position of the object, a virtual, erect and diminished image is formed between F and P, behind the convex mirror. Pole (P) is the geometric centre of the spherical mirror. Rule 3: A light ray which first passes through the centre of curvature or appears to pass through the centre of curvature, after reflection, retraces its initial path. Ans : [CBSE 2014] Spherical mirror is a part of a sphere. MCQs on Spherical Mirrors with answers . Answer: Light is defined as a form of energy that stimulates sight and makes things visible. Used as reflectors for street light bulbs as it diverges light rays over a wide area. This will clear students doubts about any question and improve application skills while preparing for board exams. A real, inverted, diminished image is formed between C and F, in front of the concave mirror. Thus, the magnification produced by these mirrors is always less than one. If the aperture of a convex mirror is small, then its focal length is equal to half its radius of curvature. All distances are measured from the pole of the mirror. The images formed by the mirrors are of two types they are What is a mirror? Activities. Of these, the brightest image is the [RPMT 2003] c. simple mirror . On the other hand for a virtual image object distance (u) is negative and image distance (v) is positive and hence the magnification is positive, i.e., the image is erect. to view a magnified view of the interior parts of the mouth are concave. This will clear students doubts about any question and improve application skills while preparing for board exams. The length along the principal axis from the pole to the principal focus is called the focal length. Class 8 > CBSE Class 8 Science Lessons Explanation, Notes, NCERT Question Answers > Light Class 8 Notes, Question Answers, Explanation Light Class 8 Notes, Question Answers, Explanation . Plane mirrors ii. Courses. d. none of the above Ans. A virtual, erect and enlarged image is formed behind the concave mirror. Question 2. Formation of Images by Spherical Mirrors If the magnification is more than 1 The image formed is magnified in size. Last updated at April 23, 2020 by Teachoo. i. Question 3. Labels: class10-physics, class10-science, class12-Physics, class8-science. Appears to pass parallel to principal axis. Depending on the position of the object in front of the concave mirror, the position, size and the nature of the image varies. Thus, the magnification produced by these mirrors is always less than one. Magnification (M) =  Heigth of the Image (Hi) Height of the Object (Ho) =  Image Distance (v) Object  distance(u) Image Formation by Convex Mirror Email This BlogThis! Unlike in a convex mirror, the nature and size of the image in a concave mirror depends on the distance of the object from the mirror. Due to this they always form diminished, virtual and erect images irrespective of the position of the object in front of them. Distances measured in the direction of the incident ray are taken as positive and the distances measured in the direction opposite to that of the incident rays are taken as negative. Convex mirrors diverge the light incident on them and hence they are called the diverging mirrors.