A telescope can resolve two stars separated by `4.6 xx 10^(-6) radian`. If wavelength of light used is `5460 Å`, what is the aperture of the objective of telescope ?
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Here, `dtheta = 4.6 xx 10^(-6)rad` `lambda = 5460 xx 10^(-10)m, D = ?` From `D = (1.22 lambda)/(dtheta) = (1.22 xx 5460 xx 10^(-10))/(4.6 xx 10^(-6))` `= 0.1448m`
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