NEET UG 2018 · Physics · Question 10
NEET 2018 Physics, question 10
Question 10 of the NEET 2018 paper (code AA) is a Physics question from Ray Optics and Optical Instruments. Its idea, Astronomical Telescope, was asked 3 times, in 2018, 2021 and 2024, across NEET 2017–2026. The CBSE official answer key gives option 1.
Updated 2026-10-08
Q10 · Physics
An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of
- 1large focal length and large diameterOfficial answer
- 2large focal length and small diameter
- 3small focal length and large diameter
- 4small focal length and small diameter
Official answer: option 1 · CBSE official answer key
Same idea
Astronomical Telescope, in other papers
NEET asked this idea 3 times, in 2018, 2021 and 2024. The other 2 questions below.
- 2024 Q40A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm. The magnifying power of telescope for…Numerical · Easy
- 2021 Q15A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since :One-line MCQ · Medium
Astronomical Telescope: every question and how it was framed
The chapter
Ray Optics and Optical Instruments in ten years of NEET
26 questions from 2017–2026, asked in 10 of 10 papers, about 2.5 a paper. Prisms, Dispersion and Optical Instruments alone had 8.