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QJEEM19Phaaba: JEE Main 2019 Physics - Class 12 JEEM19Phaaba Solution: Diameter of the objective lens of a telescope is 250 cm. For…

Diameter of the objective lens of a telescope is 250 cm. For light of wavelength 600nm. coming from a distant object, the limit of resolution of the telescope is close to :-

Multiple Choice Options

  • A 3.0 × 10–7 rad
  • B 4.5 × 10–7 rad
  • C 1.5 × 10–7 rad
  • D 2.0 × 10–7 rad

Step-by-Step Verified Solution

Limit of resolution = 1.22λd{{1.22\lambda } \over d}

= 1.22×600×10−9250×10−2{{1.22 \times 600 \times {{10}^{ - 9}}} \over {250 \times {{10}^{ - 2}}}}

= 2.9 × 10–7 rad.

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