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Nov 28

(a) Will the mirror be concave or convex? The centre of curvature of a spherical mirror is the centre of the hollow glass sphere of which the mirror is a part. Principal section. Lv 4. Define pole and principal axis of a spherical mirror. The focal length is half the radius of curvature. The focal length of a spherical mirror is the distance of principal focus from the pole of the mirror. It is represented by the letter ‘C’. The focal point of a spherical mirror is defined as the focal point of rays which hit the mirror close to the optical axis, where the sphere is well approximated by a paraboloid, and it coincides with the focal point of that paraboloid. Thus in figure (a 1) and (b 1), the distance PF is the focal length of a spherical mirror. So PC = R. The actual size MM’ of a spherical mirror is called the aperture of the mirror. Focal length. It is a virtual focus because it is obtained by extending the light rays in backward direction. (b) C is the centre of curvature of concave mirror and convex mirror respectively. Relevance. So, the principal focus of a concave mirror is a real focus. The focal length of the mirror in liquid will be: View Answer A square of side 3 c m all is located at a distance 2 5 c m from a concave mirror of focal length 1 0 c m . Please use ide.geeksforgeeks.org, generate link and share the link here. Thus in figure (a1) and (b1), the distance PF is the focal length of a spherical mirror. The focal length of a spherical mirror is represented by letter ‘f’. The principal focus of a spherical mirror is a point on the principal axis of the spherical mirror at which, the light rays which are parallel to the principal axis actually converge (meet) or appear to diverge after reflection. The focal length of a spherical mirror is the distance of principal focus from the pole of the mirror. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. Determine the position of the third person on regular N sided polygon, Determine whether the given integer N is a Peculiar Number or not, Determine winner of the Game by arranging balls in a row, Program to find Length of Bridge using Speed and Length of Train, Length of the chord the circle if length of the another chord which is equally inclined through the diameter is given, Program to find area of a Circular Segment. The focal length of a spherical mirror is the distance of principal focus from the pole of the mirror. So PF = f. Formula : edit In diagram, PF is the focal length of the mirror. Lv 4. Answer Save. In fig. See your article appearing on the GeeksforGeeks main page and help other Geeks. The focal length of a spherical mirror is the distance of principal focus from the pole of the mirror. Thus in figure (a 1) and (b 1), the distance PF is the focal length of a spherical mirror. It is represented by the symbol f. For mirrors of small aperture, f=R/2. code. 1 0. Active 1 year, 11 months ago. The distance from the vertex to the center of curvature is called radius of curvature. Pole is the middle point or centre of a spherical mirror. The focal length of spherical mirrors. In order to determine the focal length of a spherical mirror we should know the radius of curvature of that mirror. Its always ONE HALF so option D is correct. It is represented by letter ‘P’. Focal length is the distance between the center of the mirror to the principal foci. In order to determine the focal length of a spherical mirror we should know the radius of curvature of that mirror. So PF = f. Test Your Understanding and Answer These Questions: The centre of curvature of a spherical mirror is the centre of the hollow glass sphere of which the mirror is a part. The focal length of a spherical mirror is represented by letter ‘f’. The focal length of a spherical mirror is represented by letter ‘f’. By using our site, you Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below. The distance between the pole and the principal focus of the mirror, is called the focal length of the mirror. Determine the number of squares of unit area that a given line will pass through. For a spherical mirror, the focal length is equal to ____ the radius of curvature of the mirror. The straight line passing through the pole and centre of curvature of a spherical mirror and extending on both sides is called principal axis of the spherical mirror. Give the relationship between focal length and radius of curvature of a spherical mirror. Parabolic mirrors are really the only mirrors that focus parallel rays to a single point, but as long as the rays don't get too far from the principal axis then the equation above applies for spherical mirrors. Define center of curvature of a spherical mirror. If you go outside of that region, then the beams will not form a single focal spot, and instead they will form an off-focus spread of light. 1 0. cpuguy_1. It … close, link (b) What must be the radius of curvature? Don’t stop learning now. How to swap two numbers without using a temporary variable? The principal focus of a spherical mirror is represented by letter F. In the case of concave mirror all the light rays which are parallel to the principal axis meet at point F after reflection. It is represented by letter ‘R’. (a) and fig. Here one thing worth to be noted is that the centre of curvature of a concave mirror is always in front of it while the centre of curvature of a convex mirror is always behind it. We use cookies to ensure you have the best browsing experience on our website. Write a program to determine the focal length of a spherical mirror. The focal length is half the radius of curvature. Bleda The Mad.

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