Categories > Ray Optics and Optical Instruments > Microscope and Telescope > In a laboratory four convex lenses ${{L}_{1}},\,{{L}_{2}},\,{{L}_{3}}$ and ${{L}_{4}}$ of focal lengths 2, 4, 6 and 8 cm respectively are available. Two of these lenses form a telescope of length 10 cm and magnifying power 4. The objective and eye lenses are

Ray Optics and Optical Instruments

Question: In a laboratory four convex lenses ${{L}_{1}},\,{{L}_{2}},\,{{L}_{3}}$ and ${{L}_{4}}$ of focal lengths 2, 4, 6 and 8 cm respectively are available. Two of these lenses form a telescope of length 10 cm and magnifying power 4. The objective and eye lenses are


1) ${{L}_{2}},\,{{L}_{3}}$
2) ${{L}_{1}},\,{{L}_{4}}$
3) ${{L}_{3}},\,{{L}_{2}}$
4) ${{L}_{4}},\,{{L}_{1}}$
Solution: Explanation: No Explanation
Microscope and Telescope

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