NEET UG 2021 · Physics · Question 15
NEET 2021 Physics, question 15
Question 15 of the NEET 2021 paper (code O1) 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 NTA final answer key gives option 4.
Updated 2026-10-08
Q15 · Physics
A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since :
- 1a large aperture contributes to the quality and visibility of the images.
- 2a large area of the objective ensures better light gathering power.
- 3a large aperture provides a better resolution.
- 4all of the above.Official answer
Official answer: option 4 · NTA final 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
- 2018 Q10An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens ofOne-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.