1.

The optical telescope in the VainuBappu observatory at Kavalur has an objective lens of diameter 2.3.m. What is its angular resolution if the wavelenght of light used is 589 nm?

Answer»

Solution :`a=2.3m,lambda=589xx10^(-9)m,0=?`
The equation for angular resolution is, `theta = (1.22 lambda)/(a)`
SUBSTITUTING, `theta=(1.22xx589xx10^(-9))/(2.3)=321.4xx10^(-9)`
`theta = 321.4 xx 10^(-7) RAD`
NOTE: The angular resolution of human EYE is approximately. `3 xx 10^(-4)` rad


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