282448 The plane faces of two identical plano-convex lenses each having a focal length of \(50 \mathrm{~cm}\) are placed against each other to form a usual biconvex lens. The distance from this lens combination at which an object must be placed to obtain a real, inverted image which has the same size as the object is

282450 An object is moving with a velocity of \(0.01 \mathrm{~ms}^{-1}\) towards a convex lens of focal length \(0.3 \mathrm{~m}\). The magnitude of the rate of separation of image from the lens when the object is at a distance of \(0.4 \mathrm{~m}\) from the lens is:

282451 A thin bi-convex lens \((n=1.5)\) has a focal length of \(50 \mathrm{~cm}\) in air. When immersed in a transparent liquid, the focal length is measured to be \(250 \mathrm{~cm}\). The refractive index of the liquid medium is

282452 Consider two convex lenses of focal lengths ' \(f\) ' and ' \(2 \mathrm{f}\) ' mounted at the ends of a black colored tube. The diameter of the lenses and the tube are the same. The lenses are separated by a distance equal to the sum of their focal length. If a parallel became of light falls on the long focal length lens, filling its aperture, the output beam of light is best described as

282448 The plane faces of two identical plano-convex lenses each having a focal length of \(50 \mathrm{~cm}\) are placed against each other to form a usual biconvex lens. The distance from this lens combination at which an object must be placed to obtain a real, inverted image which has the same size as the object is

282450 An object is moving with a velocity of \(0.01 \mathrm{~ms}^{-1}\) towards a convex lens of focal length \(0.3 \mathrm{~m}\). The magnitude of the rate of separation of image from the lens when the object is at a distance of \(0.4 \mathrm{~m}\) from the lens is:

282451 A thin bi-convex lens \((n=1.5)\) has a focal length of \(50 \mathrm{~cm}\) in air. When immersed in a transparent liquid, the focal length is measured to be \(250 \mathrm{~cm}\). The refractive index of the liquid medium is

282452 Consider two convex lenses of focal lengths ' \(f\) ' and ' \(2 \mathrm{f}\) ' mounted at the ends of a black colored tube. The diameter of the lenses and the tube are the same. The lenses are separated by a distance equal to the sum of their focal length. If a parallel became of light falls on the long focal length lens, filling its aperture, the output beam of light is best described as

282448 The plane faces of two identical plano-convex lenses each having a focal length of \(50 \mathrm{~cm}\) are placed against each other to form a usual biconvex lens. The distance from this lens combination at which an object must be placed to obtain a real, inverted image which has the same size as the object is

282450 An object is moving with a velocity of \(0.01 \mathrm{~ms}^{-1}\) towards a convex lens of focal length \(0.3 \mathrm{~m}\). The magnitude of the rate of separation of image from the lens when the object is at a distance of \(0.4 \mathrm{~m}\) from the lens is:

282451 A thin bi-convex lens \((n=1.5)\) has a focal length of \(50 \mathrm{~cm}\) in air. When immersed in a transparent liquid, the focal length is measured to be \(250 \mathrm{~cm}\). The refractive index of the liquid medium is

282452 Consider two convex lenses of focal lengths ' \(f\) ' and ' \(2 \mathrm{f}\) ' mounted at the ends of a black colored tube. The diameter of the lenses and the tube are the same. The lenses are separated by a distance equal to the sum of their focal length. If a parallel became of light falls on the long focal length lens, filling its aperture, the output beam of light is best described as

282448 The plane faces of two identical plano-convex lenses each having a focal length of \(50 \mathrm{~cm}\) are placed against each other to form a usual biconvex lens. The distance from this lens combination at which an object must be placed to obtain a real, inverted image which has the same size as the object is

282450 An object is moving with a velocity of \(0.01 \mathrm{~ms}^{-1}\) towards a convex lens of focal length \(0.3 \mathrm{~m}\). The magnitude of the rate of separation of image from the lens when the object is at a distance of \(0.4 \mathrm{~m}\) from the lens is:

282451 A thin bi-convex lens \((n=1.5)\) has a focal length of \(50 \mathrm{~cm}\) in air. When immersed in a transparent liquid, the focal length is measured to be \(250 \mathrm{~cm}\). The refractive index of the liquid medium is

282452 Consider two convex lenses of focal lengths ' \(f\) ' and ' \(2 \mathrm{f}\) ' mounted at the ends of a black colored tube. The diameter of the lenses and the tube are the same. The lenses are separated by a distance equal to the sum of their focal length. If a parallel became of light falls on the long focal length lens, filling its aperture, the output beam of light is best described as