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Physics · PYQ NEET UG 2020

हिन्दी

Assume that light of wavelength \( 600\text{ nm} \) is coming from a star. The limit of resolution of telescope whose objective has a diameter of \( 2\text{ m} \) is

  1. \( 1.83 \times 10^{-7}\text{ rad} \)
  2. \( 7.32 \times 10^{-7}\text{ rad} \)
  3. \( 6.00 \times 10^{-7}\text{ rad} \)
  4. \( 3.66 \times 10^{-7}\text{ rad} \)

Correct answer · Option 4

\( 3.66 \times 10^{-7}\text{ rad} \)

Explanation

Limit of resolution \( \theta = \frac{1.22 \lambda}{d} = \frac{1.22 \times 600 \times 10^{-9}}{2} = 3.66 \times 10^{-7}\text{ rad} \).
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