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Question 12: NCERT Solutions for 12th Class Physics: Chapter 9-Ray Optics and Optical Instruments

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Question 12: NCERT Solutions for 12th Class Physics: Chapter 9-Ray Optics and Optical Instruments A person with a normal near point (25 cm) using a compound microscope with objective of focal length 8.0 mm and an eyepiece of focal length 2.5 cm can bring an object placed at 9.0 mm from the objective in sharp focus. What is the separation between the two lenses? Calculate the magnifying power of the microscope.

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  1. Solution:
    The image is formed at least distance of distinct vision for sharp focus. The separation between two lenses will be υ0 + |υe|

    Let us find first υ0 the image distance for objective lens.

    Also we can find object distance for eyepiece υe as we know

    Check the complete chapter with solutions.

    NCERT Solutions for 12th Class Physics: Chapter 9-Ray Optics and Optical Instruments