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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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Angular limit of resolution of a telescope is given by formula,
`alpha_(min)=(1.22lamda)/(D)`
`:.alpha_(min)=(1.22xx6000xx10^(-8))/(100xx2.54)" "("":.1" inch")`
`:.alpha_(min)=(1.22xx6)/(2.54)xx10^(3-8-2)" "2.54cm)`
`:.alpha_(min)=2.882xx10^(-7)rad`
Note : In above example, if angular resolution power of telescope is asked then it is :
`P=(1)/(alpha_(min))=3.47xx10^(5)(rad)^(-1)`
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 80 inch?
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