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Optical Instruments — JEE Main & Advanced Physics PYQs

46 previous year questions from Optical Instruments with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

46 questionsPhysicsSolutions on every page
1

A person observes several trees in an open space, with the following details given. Arrange the trees in decreasing order of their apparent sizes. Tree Height (m) Distance from the

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When the image is formed at the near point ( 25 cm ) of a normal eye, a simple microscope exhibits a magnifying power of 3.0 . Calculate the magnifying power of this microscope if

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A child has a near point at 10 cm . Determine the maximum angular magnification the child can obtain using a convex lens of focal length 10 cm .

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When the image is formed at the near point ( 25 cm ) of a normal eye, a simple microscope exhibits a magnifying power of 3.0 . Determine the focal length of the microscope.

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An object is viewed using a simple microscope of focal length 12 cm . To obtain the maximum angular magnification, at what distance from the lens should the object be positioned? T

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A simple microscope is rated at 5 X for a normal relaxed eye. Determine its magnifying power for a relaxed farsighted eye that has a near point of 40 cm .

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Determine the maximum magnifying power of a compound microscope equipped with a 25 diopter lens as the objective and a 5 diopter lens as the eyepiece, given a separation of 30 cm b

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In a compound microscope, the separation between the objective and the eyepiece is adjustable between 9.8 cm and 11.8 cm . Given that the focal lengths of the objective and the eye

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An eye is capable of distinguishing between two points on an object if their separation is greater than 0.22 mm when the object is held 25 cm from the eye. This object is subsequen

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A compound microscope is composed of an objective with a focal length of 1 cm and an eyepiece with a focal length of 5 cm . An object is positioned 0.5 cm from the objective. Deter

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When the image is formed at infinity, a compound microscope has a magnifying power of 100 . The focal length of the objective is 0.5 cm and the tube length is 6.5 cm . Calculate th

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An optical instrument employed for angular magnification contains an objective of 25 D and an eyepiece of 20 D . When the eye is least strained, the tube length is 25 cm . What typ

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An optical instrument employed for angular magnification contains an objective of 25 D and an eyepiece of 20 D . When the eye is least strained, the tube length is 25 cm . What is

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An astronomical telescope is to be designed with a magnifying power of 50 in normal adjustment. If the length of the tube is 102 cm , determine the powers of the objective and the

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An astronomical telescope's eyepiece has a focal length of 10 cm . When the telescope is focussed for normal vision of distant objects, the tube length is 1.0 m . Determine the foc

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A Galilean telescope measures 27 cm in length when it is focussed to produce an image at infinity. Determine the focal length of the eyepiece, given that the objective has a focal

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A farsighted person is unable to see objects placed closer than 50 cm . Determine the power of the lens required to see objects located at 20 cm .

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A nearsighted person cannot clearly see past 200 cm . Determine the power of the lens required for the person to view objects at large distances.

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A person wears glasses with a power of -2.5 D . Is the person farsighted or nearsighted, and what is the far point of the person without the glasses?

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A professor reads a greeting card received on his 50 th birthday using +2.5 D glasses, holding the card 25 cm away. Ten years later, he reads his farewell letter using the same gla

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A normal eye has its retina positioned 2 cm behind the eye-lens. Determine the power of the eye-lens when the eye is fully relaxed.

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A normal eye has its retina positioned 2 cm behind the eye-lens. Determine the power of the eye-lens when the eye is most strained.

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The near point and the far point of a child are at 10 cm and 100 cm , respectively. If the retina is located 2.0 cm behind the eye-lens, determine the range of the power of the eye

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A nearsighted person is unable to see objects beyond 25 cm . Assuming the separation of the glass from the eye is 1 cm , determine the power of the lens required to view distant ob

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A person has a near point at 100 cm . What power of lens is required to read at 20 cm if they use a contact lens?

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A person has a near point at 100 cm . What power of lens is required to read at 20 cm if they use spectacles having glasses 2.0 cm separated from the eyes?

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Priya wears +1.5 D glasses to achieve normal vision from 25 cm onwards. She employs a 20 D lens as a simple microscope to view an object. Determine the maximum magnifying power if

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Priya wears +1.5 D glasses to achieve normal vision from 25 cm onwards. She employs a 20 D lens as a simple microscope to view an object. Determine the maximum magnifying power if

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A woman cannot see objects closer than 40 cm from her left eye and closer than 100 cm from her right eye. During a hiking expedition, she is separated from her group. She attempts

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A woman cannot see objects closer than 40 cm from her left eye and closer than 100 cm from her right eye. During a hiking expedition, she is separated from her group. She attempts

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The perceived size of an object by an eye is primarily determined by

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The muscles of a normal eye experience the least strain when focusing on an object that is

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For a normal eye, objects closer than 25 cm cannot be seen clearly because

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A person Vikram can clearly see objects situated between 25 cm and 200 cm . Which of the following may represent the range of clear vision for Rohan, who has stronger muscles than

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When the eye observes objects located at various distances, which of the following remains constant?

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The focal length of a normal eye-lens is approximately

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The distance from the eye-lens to the retina is x . For a normal eye, the maximum focal length of the eye-lens is

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A person using spectacles with a focal length of +1 m is unable to see objects clearly beyond 1 m . This situation occurs

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When an object is positioned at a distance u from a simple microscope having a focal length f , the resulting angular magnification depends

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A man views a small object located at his near point. Without altering the positions of his eye or the object, he places a simple microscope with a magnifying power of 5 X in front

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In order to increase the angular magnification of a simple microscope, one must increase

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For which of the following instruments is the final image erect?

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A person has an eye-lens whose maximum focal length exceeds its distance from the retina. This eye is

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Identify the correct alternatives.

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In a compound microscope, the focal length of the objective is f_o , and the separation between the objective and the eyepiece is L . An object is positioned at a distance u from t

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Upon viewing an object, the image created on the retina is

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