| ⇦ | 
| ⇨ |
Diameter of the objective of a telescope is 200 cm. What is the resolving power of a telescope? Take wavelength of light=5000Å.
Options
(a) 6.56×10⁶
(b) 3.28×10⁵
(c) 1×10⁶
(d) 3.28×10⁶
Correct Answer:
3.28×10⁶
Explanation:
Given, wavelength of light, λ = 5000Å = 5000 × 10⁻¹⁰ = 5 × 10⁻⁷ m
Diameter of telescope, D = 200 cm = 2 m
Resolving power of a telescope = 1 / dθ = D / 1.22λ
where, dθ = limit of resolution, λ = wavelength of light used and D = diameter of aperture of objective
So, Resolving power = 2 / (1.22 × 5 × 10⁻⁷)
= 2 × 10⁷ / 6.1
= 3.278 × 10⁶
= 3.28 × 10⁶
Related Questions: - Two tuning forks are sounded together and produce 2 beats per second.
- An electric dipole of moment p is lying along a uniform electric field E. The work
- In a circuit, 5% of total current passes through a galvanometer. If resistance
- Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV.
- A galvanometer coil has a resistance of 15 ohm and gives full scale deflection
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two tuning forks are sounded together and produce 2 beats per second.
- An electric dipole of moment p is lying along a uniform electric field E. The work
- In a circuit, 5% of total current passes through a galvanometer. If resistance
- Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV.
- A galvanometer coil has a resistance of 15 ohm and gives full scale deflection
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply