282475 The focal length of objective and eye lens of microscope are \(1.6 \mathrm{~cm}\) and \(2.5 \mathrm{~cm}\) respectively. The distance between the two lenses is \(21.7 \mathrm{~cm}\). If the final image is formed at infinity, then the distance between the object lens and object is

282476 The plane faces of two identical plano-convex lenses, each having focal length of \(40 \mathrm{~cm}\), are placed against each other to form a common convex lens. The distance from this lens at which an object must be placed to obtain a real inverted image with magnification equal to unit is

282477 The power of lens used by a short- sighted person is -2D. Find the maximum distance of an object. Which he can see without spectacles.

282478 A convex lens of focal length \(25 \mathrm{~cm}\) and a concave lens of focal length \(10 \mathrm{~cm}\) are joined together. The power of the combination will be

282475 The focal length of objective and eye lens of microscope are \(1.6 \mathrm{~cm}\) and \(2.5 \mathrm{~cm}\) respectively. The distance between the two lenses is \(21.7 \mathrm{~cm}\). If the final image is formed at infinity, then the distance between the object lens and object is

282476 The plane faces of two identical plano-convex lenses, each having focal length of \(40 \mathrm{~cm}\), are placed against each other to form a common convex lens. The distance from this lens at which an object must be placed to obtain a real inverted image with magnification equal to unit is

282477 The power of lens used by a short- sighted person is -2D. Find the maximum distance of an object. Which he can see without spectacles.

282478 A convex lens of focal length \(25 \mathrm{~cm}\) and a concave lens of focal length \(10 \mathrm{~cm}\) are joined together. The power of the combination will be

282475 The focal length of objective and eye lens of microscope are \(1.6 \mathrm{~cm}\) and \(2.5 \mathrm{~cm}\) respectively. The distance between the two lenses is \(21.7 \mathrm{~cm}\). If the final image is formed at infinity, then the distance between the object lens and object is

282476 The plane faces of two identical plano-convex lenses, each having focal length of \(40 \mathrm{~cm}\), are placed against each other to form a common convex lens. The distance from this lens at which an object must be placed to obtain a real inverted image with magnification equal to unit is

282477 The power of lens used by a short- sighted person is -2D. Find the maximum distance of an object. Which he can see without spectacles.

282478 A convex lens of focal length \(25 \mathrm{~cm}\) and a concave lens of focal length \(10 \mathrm{~cm}\) are joined together. The power of the combination will be

282475 The focal length of objective and eye lens of microscope are \(1.6 \mathrm{~cm}\) and \(2.5 \mathrm{~cm}\) respectively. The distance between the two lenses is \(21.7 \mathrm{~cm}\). If the final image is formed at infinity, then the distance between the object lens and object is

282476 The plane faces of two identical plano-convex lenses, each having focal length of \(40 \mathrm{~cm}\), are placed against each other to form a common convex lens. The distance from this lens at which an object must be placed to obtain a real inverted image with magnification equal to unit is

282477 The power of lens used by a short- sighted person is -2D. Find the maximum distance of an object. Which he can see without spectacles.

282478 A convex lens of focal length \(25 \mathrm{~cm}\) and a concave lens of focal length \(10 \mathrm{~cm}\) are joined together. The power of the combination will be