Free physics question bank
Optical Instruments & Magnifying Power questions with solutions
Practice Geometrical optics for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
Showing 1–10 of 39 questions
- MCQeasyGeometrical optics
A scientist is observing a bacteria through a compound microscope. For better analysis and to improve its resolving power he should: (Select the best option)
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JEE Mains29 January 2023Shift 2Evening Shift
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If the focal length of objective lens is increased, then magnifying power of:
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AIPMT 2014NEET Previous Year
Open question & full solution → - MCQmediumGeometrical optics
If we need a magnification of 375 from a compound microscope of tube length 150 mm and an objective of focal length 5 mm, the focal length of the eye-piece, should be close to:
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JEE Mains 2020
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An astronomical telescope has an eyepiece of focal length 5 cm. If the angular magnification in normal adjustment is 10, the distance between the objective and the eye piece is
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JEE MainsJEE Advanced
Open question & full solution → - MCQmediumGeometrical optics
A simple telescope consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focussed on a distant object in such a way that parallel rays emerge from the eye lens. If the object subtend an angle of 2° at the objective then find the angular width of the image (in degree).
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JEE MainsJEE Advanced
Open question & full solution → - MCQeasyGeometrical optics
In a reflecting telescope, a secondary mirror is used to:
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JEE Mains8 April 2023Shift 1Morning Shift
Open question & full solution → - MCQeasyGeometrical optics
In a microscope of tube length 10 cm two convex lenses are arranged with focal length of 2 cm and 5 cm. Total magnification obtained with this system for normal adjustment is 5ᵏ. The value of k is_____
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JEE Mains 202624 January Morning Shift
Open question & full solution → - MCQmediumGeometrical optics
A normal eye is not able to see objects closer than 25 cm because
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JEE MainsJEE Advanced
Open question & full solution → - MCQmediumGeometrical optics
When the length of an astronomical telescope tube increases its magnifying power
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JEE MainsJEE Advanced
Open question & full solution → - MCQmediumGeometrical optics
The focal length of the objective of a compound microscope is fo and its distance from the eyepiece is L. The object is placed at a distance u from the objective. For proper working of the instrument,
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JEE MainsJEE Advanced
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