A point object O is placed on the principle axis of a convex lens of focal length f=20cm at a distance of 40cm to the left of it. The diameter of the lens is 10cm. An eye is placed 60cm to right of the lens and a distance h below the principle axis. The maximum value of h to see the image is?

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A point object O is placed on the principle axis of a convex lens of focal length f=20cm at a distance of 40cm to the left of it. The diameter of the lens is 10cm. An eye is placed 60cm to right of the lens and a distance h below the principle axis. The maximum value of h to see the image is?

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The ciliary muscles of eye control the curvature of the lens in the eye and hence can alter the effective focal length of the system. When the muscles are fully relaxed, the focal length is maximum. When the muscles are strained the curvature of lens increases (that means radius of curvature decreases) and focal length decreases. For a clear vision the image must be on retina. The image distance is therefore fixed for clear vision and it equals the distance of retina from eye-lens. It is about 2.5 cm for a grown-up person.A person can theoretically have clear vision of objects situated at any large distance from the eye. The smallest distance at which a person can clearly see is related to minimum possible focal length. The ciliary muscles are most strained in this position. For an average grown-up person minimum distance of object should be around 25 cm.A person suffering from eye defects uses spectacles (Eye glass). The function of the lens of spectacles is to form the image of the objects within the range in which person can see clearly. The image of the spectacle-lens becomes object for eye-lens and whose image is formed on retina.The number of spectacle-lens used for the remedy of eye defect is decided by the power of the lens required and the number of spectacle-lens is equal to the numerical value of the power of lens with sign. For example power of lens required is +3D (converging lens of focal length 100/3 cm) then number of lens will be +3.For all the calculations required you can use the lens formula and lens makers formula. Assume that the eye lens is equiconvex lens. Neglect the distance between eye lens and the spectacle lens.Q.Maximum focal length of eye lens of normal person is

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Radius of curvature of a concave convex lens are 40cm 20cm shown to convex side is silvered to distance x on the principal axis where an object is placed so that its image is created on the object itself is given as 4 beta and the value of beta?

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Statement-1 : A spherical surface of radius of curvature R separates two media of refractive index n1 and n2 as shown. If an object O (a thin small ro d) is placed upright on principal axis at a distance R from pole (i.e, placed at centre of curvatur e), then the size of image is same as size of object.Statement-2 : If a point object is placed at centre of curvature of spherical surface separating two media of different refractive index, then the image is also formed at centre of curvature, i.e., image distance is equal to object distance.

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A point object starts moving along x-axis with constant velocity 0.5 metre per second in positive x direction from origin a plane mirror of length 2 metre is placed parallel to x axis at a distance 3 from x axis and at a distance of 10 metre from y axis as shown in the figure time for which an observer positioned at 11, minus one will see image of point object in the mirror will be?

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A convex mirror of focal length f and a convex lens of focal length of f/2 placed at a distance 2f apart. the final image is formed at the middle of the lens and mirror find the distance of object from lens. Answer : 5f/8 Please explain?

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A point object O is placed on the principle axis of a convex lens of focal length f=20cm at a distance of 40cm to the left of it. The diameter of the lens is 10cm. An eye is placed 60cm to right of the lens and a distance h below the principle axis. The maximum value of h to see the image is? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about A point object O is placed on the principle axis of a convex lens of focal length f=20cm at a distance of 40cm to the left of it. The diameter of the lens is 10cm. An eye is placed 60cm to right of the lens and a distance h below the principle axis. The maximum value of h to see the image is? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A point object O is placed on the principle axis of a convex lens of focal length f=20cm at a distance of 40cm to the left of it. The diameter of the lens is 10cm. An eye is placed 60cm to right of the lens and a distance h below the principle axis. The maximum value of h to see the image is?.

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