what is the focal length of this mirror?
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Focal length (shown in red) is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror — the point where parallel rays of light meet, or converge.
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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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Definition: Focal length. Focal length (shown in red) is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror — the point where parallel rays of light meet, or converge.
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Answer. Answer: The focal length of a double convex length is 50 cm. Hence, the focal length of a double convex length is 50 cm.
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Accepted Answer: The focal length of the concave mirror does not change when it is immersed in water because focal length of a mirror does not depend upon the refractive index of the medium. ... Therefore, when a convex lens is dipped into water, its focal length increases.
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The focal length of the lens is the distance between the lens and the image sensor when the subject is in focus, usually stated in millimeters (e.g., 28 mm, 50 mm, or 100 mm). In the case of zoom lenses, both the minimum and maximum focal lengths are stated, for example 18–55 mm.
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It does not say the NATURE of the image. Since the mirror is concave; the image could be REAL or VIRTUAL. To play it safe; we must provide TWO solutions: Solution I: using the mirror formula: 1/30 = 1/Do + 1/3 Do → Do = 40 cm.
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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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f, the focal length, is positive for a concave mirror, and negative for a convex mirror. When the image distance is positive, the image is on the same side of the mirror as the object, and it is real and inverted. ... A negative m means that the image is inverted.
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The lens itself is gigantic. Imagine a telephoto lens 30 feet long! That's 8.8 meters. It has a fixed aperture of f/14.7.
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Hence, focal length f = 25 cm. We are asked to calculate the radius of curvature of the mirror. The radius of curvature of any spherical mirror is twice the focal length of that respective mirror. = 50 cm.
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Determine the focal length of a convex mirror that produces an image that is 16.0 cm behind the mirror when the object is 28.5 cm from the mirror. (Careful: image distances for convex mirrors are always negative.)
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Focal Length - The distance between the pole P of the concave mirror and the focus F is the focal length of the concave mirror. Thus, the focal length of a concave mirror can be estimated by obtaining a 'Real image' of a distant object at its focus, as shown in the figure.
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According to our science textbook focal length(f) of a mirror/ lens is equal to half its radius of curvature(R). Which means that there is a specific focal length for a given lens/mirror(f=R/2).
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A cardboard screen is put behind the lens. We change the distance of the screen from the convex lens until a clear inverted image of the window is formed on the screen. Measure the distance of the screen from the lens with a scale. This distance will be the focal length of convex lens.
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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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To determine focal length of a given concave mirror The distance between the selected distinct object should be more than 50 ft. The concave mirror placed on the mirror stand and the distant object should be facing each other. The screen should be placed in front of the reflecting surface of the mirror.