JEE Mains · Physics · STD 12 - 10. Wave optics
A telescope with objective diameter \(R\) is used to observe a distant star emitting light of wavelength \(500\) nm, at a resolution of \(5 \times 10^{-7}\) radian. The value of \(R\) is _____ cm.
- A \(61\)
- B \(122\)
- C \(244\)
- D \(305\)
Answer & Solution
Correct Answer
(B) \(122\)
Step-by-step Solution
Detailed explanation
The limit of resolution of a telescope is given by the formula: \(\Delta \theta = \dfrac{1.22 \lambda}{R}\) where \(\lambda\) is the wavelength of light and \(R\) is the diameter of the objective lens. Given:…
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