A converging lens such as a magnifying glass has a radius of curvature of 14.6 cm. A letter in a book under this magnifying glass appears 3 times larger than its actual size. If the image is upright. how many centimeters is the book from, the magnifying glass? Please round your answer to one decimal place
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- An object is placed 40 cm in front of a thin lens. If an image forms at a distance 120 cm from the lens, on the opposite side as the object, what is the focal length of the lens, in cm? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.A person with normal vision and a reference visual range of 250 mm uses a magnifying glass with a focal length of 102 mm. What magnification does the magnifying glass provide? Enter the result as a decimal number.Some telephoto cameras use a mirror rather than a lens to magnify distant objects. What radius of curvature R, in meters, does the mirror need to have to replace a 550 mm focal length telephoto lens?
- Each of the parts in this problem has a description of an object and an optical device (a lens or a mirror). A sketch of each part is shown below in which the centers of the mirrors and the focal points of the lenses are shown. The radius of curvature of each mirror is R, and the focal length of the lenses is f. For each part, determine: the image is real, virtual, or no image is formed the image is on the same side of the optical device as the object or the opposite side (if there is no image, indicate this) if at image is formed, on which side of the optical device must the observer be in order to see it A. An object is on the right side of a spherical mirror, a distance s > R from the mirror. The reflective surface of the mirror faces the object and is concave.The image is ---Select--- real virtual neither (no image is formed)The image is ---Select--- on the same side of the mirror as the object on the opposite side of the mirror from the object neither (no image is…A virtual image of magnification +0.5 is produced when an object is placed 10 cm in front of a curved mirror. Determine the radius of curvature of the mirror.A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +2.6. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror? If the object is inverted, then enter a negative number. Otherwise, enter a positive number. Number i Units >
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- An optician is designing a contact lens. The material has is an index of refraction of 1.35. In order to yield the prescribed focal length, the optician specifies the following dimensions: inner radius of curvature = +2.60 cm outer radius of curvature = +2.06 cm where the inner radius of curvature describes the surface that touches the eye, and the outer radius of curvature describes the surface that first interacts with incoming light. What is the focal length of this contact lens (in cm)? answer in cmA concave mirror produces a real image that is 3.0 times as tall as the object itself. If the object is 15.0 cm in front of the mirror: a) what is the image distance? b) what is the focal length of the mirror? Show the algebraic form of any equation(s) applied and report all answers with the correct units and number of significant figures.A plane convex lens is made of glass ( n = 1.5) with one flat surface and the other having a radius of 30 cm. What is the focal length (in cm) of the lens?