Question
Download Solution PDFWhen the length of a microscope tube is increased, its magnifying power:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Magnifying Power: The magnifying power of a microscope is defined as the ratio of the angles subtended by the image and the object at the eye when both are at the least distance of distinct vision from the eye.
\(\therefore m=\frac{\beta}{\alpha}\)
Also, magnifying power of a microscope is given by
- \(m=\frac{-L}{f_o}.\frac{D}{f_e}\)
where
where, L is length of tube and D is least distance for clear vision
fo is focal length of objective
fe is focal length of eyepiece.
So, magnifying power is directly proportional to length of the tube. Hence, if the length of the tube increases then the magnifying power also increases.
Hence, the correct answer is Option-Increases.
Last updated on Jun 19, 2025
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