In an experiment with a microscope, light of wave length 4240 `overset(@)A` is used. The limit of resolution is found to be `3xx10^(-7) m. ` What is the semi vertical angle?

Explanation

Given `lambda=4.24xx10^(-7) m, dx=3xx10^(-7) m `
We know that , `dx=(lambda)/(2 n sin theta)` where `n=1`
i.e., `sin theta^@=(4.24xx10^(-7))/(2xx1xx3xx10^(-7))=0.7067`
i.e., `theta=45^@`.