JEE Previous Year Question
An object viewed from a near point distance of 25cm, using a microscopic lens with magnification '6', gives an unresolved image. A resolved image is observed at infinite distance with a total magnification double the earlier using an eyepiece along with the given lens and a tube of length 0.6m, if the focal length of the eyepiece is equal to ___ cm.
Topic: JEE PYQ
Answer: 25. Full step-by-step solution below.
Correct answer: 25
Solution
(25)For simple microscope,
For compound microscope,
More Optical Instruments PYQs
- The magnifying power of a telescope with tube length 60 is 5 . Then the focal length of its eye piece is
- A compound microscope is a magnification of 24. The focal length of the eyepiece is . The final image is forme…
- The magnifying power of a telescope with tube length 60 cm is 5. What is the focal length of its eye piece?
- In normal adjustment, for a refracting telescope, the distance between objective and eye piece is 30 cm. The focal length of the o…
- A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively To view an object 200 cm away fro…