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Wave Optics question

2005 · Q138
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Wave Optics question

2005 · Q138

NEETPhysicsWave OpticsMCQ+4 / −1
The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 A∘\mathop A\limits^ \circA∘​ is of the order of
  1. A
    106 rad
  2. B
    10−-−2 rad
  3. C
    10−-−4 rad
  4. D
    10−-−6 rad.
View written solutionFree

Correct answer: C

The angular resolution,

\Delta $$\theta = 1.22λD{{1.22\lambda } \over D}D1.22λ​

= 1.22×5000×10−80.1{{1.22 \times 5000 \times {{10}^{ - 8}}} \over {0.1}}0.11.22×5000×10−8​

= 6.1 ×\times× 10-4

∴\therefore∴ Order = 10-4

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