what is the relationship between the number of images and the angle between the mirrors?
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The number of images is 360/x, where x is the angle between the two mirrors. If the angle x is 60 there will be 5 images plus the one object that is reflected by the two mirrors. In a barber's saloon the mirrors are placed parallel, one in front of you and the other behind you. So there will be infinite images.
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The fact that light can get through the mirror is not always bad. If you place a mirror behind the two-way mirror (around 2 inches away) and box it in, then there will be an infinite reflection of your image when looking at the two-way mirror.
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If the image and object are on the same side of the lens, the image distance is negative and the image is virtual. For converging mirrors, the focal length is positive. ... Note that in certain cases involving more than one lens the object distance can be negative.
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The numbers beneath the frames reflect the SIZE MEASUREMENTS in millimeters (mm). THE FIRST NUMBER (ex.54) = the width of the lenses. THE SECOND NUMBER (ex.15) = the distance between the lenses. THE THIRD NUMBER (ex.140) = the length of the temple arm including the portion going behind the ear.
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In conclusion, plane mirrors produce images with a number of distinguishable characteristics. Images formed by plane mirrors are virtual, upright, left-right reversed, the same distance from the mirror as the object's distance, and the same size as the object.
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A plane mirror can be considered as a spherical mirror of infinite radius of curvature. Focal length is half of radius of curvature and hence it is infinity. You can use the mirror formula also to get the focal length of a plane mirror, where the image distance = − object distance.
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Explanation: Plane mirror forms image exactly the same size as the object is. ... So the difference in size of the image of the same object formed by a small and large plane mirror will be zero.
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The f-number of an optical system (such as a camera lens) is the ratio of the system's focal length to the diameter of the entrance pupil ("clear aperture"). It is a dimensionless number that is a quantitative measure of lens speed, and an important concept in photography. ... It is the reciprocal of the relative aperture.
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Hence the focal length of a concave mirror is negative. In a convex mirror, the light rays from the object diverge after reflection. Light rays from infinity, parallel to the principal axis, thus move away from each other and do not meet at a point. ... Hence the focal length of a convex mirror is positive.
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The focal length of a plane mirror is infinite. When parallel rays fall on a mirror surface, they are brought to a point after reflection.
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You can measure the radius of curvature (R) of the mirror by measuring the distance between convex mirror and the screen placed behind the mirror. You can calculate the focal length of the mirror using the equation f = R/2.
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Focal Length. The focal length ( f ) is the distance from a lens or mirror to the focal point ( F ). This is the distance from a lens or mirror at which parallel light rays will meet. ... Light rays that are parallel to each other, but not to the optical axis, will meet on the focal plane.
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the appearance of image in right hand side as left hand side and vice versa is known as lateral inversion. ... Concave mirror produces real and inverted images except when the object is placed between pole and focus. But the convex mirror always produces virtual and erect images.
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The angle of reflection is equal to the angle of incidence. Both angles are measured from the normal. The normal is an imaginary line at right angles to the plane mirror.
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The focal length of a mirror is given by f2​=v1​−u1​.
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['Plane Mirror — These are flat mirrors that reflect images in their normal proportions, reversed from left to right. ... ', 'Concave Mirror — Concave mirrors are spherical mirrors that curve inward like a spoon. ... ', 'Convex Mirror — Convex mirrors are also spherical mirrors.']
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4 Answers. The relationship is a simple inverse, i.e. If you keep the same object and the same focal length you get: size = 1/ distance (the =-sign should be proportional-sign).