# prove that focal length of plane mirror is infinity

Technically, yes - you could call the focal length of a plane mirror "undefined", since it doesn't have a particular value. Share 0 A ray of light falling normally on a plane mirror, then angle of reflection will be : (a) 90° (b) 180° (c) 0° (d) 45° Answer: (c) 0° For normal incidence on a plane mirror, the angle of reflection will be zero. At infinity. d. Virtual and inverted . You can use the mirror formula also to get the focal length of a plane mirror, where the image distance = − object distance.) b. Share with your friends. a. But this length is that whole distance minus the focal length. d. None of these. This site is using cookies under cookie policy. ==>focal length is half of curvature and Hence, it is infinity. An image formed by a plane mirror is virtual, erect, laterally inverted, of same size as that of object and at the same distance as the object from the mirror. When an object is placed infront of a plane-mirror an image is formed behind the mirror at a distance equal to the distance of the object from the mirror.That is distance of the image from the mirror= V = -U. from the law of distances, 1/F = 1/U + 1/V. 1/F = 1/U - 1/U = 0 . 1/F = 1/U - 1/U = 0. 2. c. Negative. An object is placed at distance 20 cm from mirror. Power of a plane mirror is zero. Focal length of plane mirror is. MCQ Of Chapter Light Class 10 Question 7. ==>A plane mirror can be considered as a spherical mirror of infiniteradius of curvature. You can use the mirror formula also to get thefocal length of a plane mirror, where the image distance = − objectdistance, please mark as brainlist answer and follow me please thank answer. 2 Answers. It comes from the extension of the focal length of a spherical mirror of radius of curvature ##R##, which is ##f=R/2##. Focal length is half of radius of curvature and hence it is infinity. But the use of infinity for the value comes from the equation for the focal length of a mirror, f = -R/2, where R is the radius of curvature of the mirror. b. Focal length as well as radius of curvature of a plane mirror is infinity. A plane mirror can be considered as a spherical mirror of infinite radius of curvature. This means the focal point is at infinity, so the mirror equation simplifies to $d_o=−d_i$ Answer: d Explanation: (d) The focal length of spherical mirror does not depends on the surrounding medium. Zero. 3. When an object is placed infront of a plane-mirror an image is formed behind the mirror at a distance equal to the distance of the object from the mirror.That is distance of the image from the mirror= V = -U. from the law of distances, 1/F = 1/U + 1/V . ==>The mirror formula to get the focal length of a mirror where,the image distance - objectdistance. Proof of Focal length of a Plane mirror is infinity - YouTube a. Information about your device and internet connection, including your IP address, Browsing and search activity while using Verizon Media websites and apps. yet using infinity for the cost comes from the equation for the focal length of a reflect, f = -R/2, the place R is the radius of curvature of the reflect. Using mirror eq prove that focal length of plane mirror is infinity. 1. Virtual objects produce real images , however. You can change your choices at any time by visiting Your Privacy Controls. To enable Verizon Media and our partners to process your personal data select 'I agree', or select 'Manage settings' for more information and to manage your choices. That is F = infinity. (A plane mirror can be considered as a spherical mirror of infinite radius of curvature. Chitosan nanoparticles can be prepared byionotropic gelation technique using_(1 Point)​, चार्ट मॉडल एवं चित्र की सहायता से मनुष्य में होने वाले रोगों का अध्ययन करना।​. The focal length of a concave mirror is 20 cm. Question 12. Log in. Technically, confident - you may desire to call the focal length of a aircraft reflect "undefined", because of fact it would not have a definite cost. Yahoo is part of Verizon Media. Join now. Focal length of a plane mirror is infinity. A plane mirror has ##R \to \infty##, so ##f \to \infty## too. It’s focal length in air and water differ by (a) 15 (b) 20 (c) 30 (d) 0. So this is di minus the focal length. Image formed by plane mirror is. Honey7999685171 Honey7999685171 27.08.2020 Science Secondary School +5 pts. We can extend the mirror equation to the case of a plane mirror by noting that a plane mirror has an infinite radius of curvature. Log in. A plane mirror can be considered as a spherical mirror of infiniteradius of curvature. Real and inverted. [ citation needed ] The focal length of a plane mirror is infinity ;  its optical power is zero.

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