The magnifying power of a telescope with tube length 60 cm is 5

PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

The magnifying power of a telescope with tube length 60 cm is 5. What is the focal length of its eye piece? (1) 20 cm (2) 40 cm (3) 30 cm (4) 10 cm