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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
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- To get three images of single object, one should have two plane mirrors at an angle of
- In forward biasing of the p-n junction
- A particle moves a distance x in time t according to equation x = (t + 5)⁻¹
- 40 g of Argon is heated from 40⁰C to 100⁰C (R=2 cal/mole). Heat absorbed at constant
- A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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