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NEET Sample Paper NEET Sample Test Paper-55

  • question_answer
    A telescope has an objective lens of 10 cm diameter and is situated at a distance of 1 km from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is \[5000\overset{{}^\circ }{\mathop{A}}\,\] is of the order of

    A) 5 mm

    B)              5 cm

    C) 2.5m                

    D) 5m

    Correct Answer: A

    Solution :

    By theory, limit of resolution \[d\theta \,\,=\,\,\frac{d}{x}\,\,=\,\,\frac{\lambda }{D}\,\] \[\therefore \,\,d=\frac{x\lambda }{D}\,=\,\frac{{{10}^{5}}\times 5\times {{10}^{-5}}}{10}\,\,=\,\,5\,mm\]


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