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Assume that light of wavelength 6000Å is...

Assume that light of wavelength `6000Å` is coming from a star. What is the limit of resolution of a telescope whose objective has a diameter of 100 inch

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A 100 inch telescope implies that
`= 100 "inch"= 254 cm.` Thus if,
`lambda approx 6000 dotA= 6xx 10^(-5)cm` then,
`triangle theta = (1.22 lambda)/(a) approx 2.9xx 10^(-7)` radians.
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