By using light of wavelength 5200 Å, two points separated by a distance of 0.12 mm can just be resolved by a microscope. What will be the limit of resolution, if light of wavelength 6500 Å is used?

Options

A. 0.10 mm
B. 0.08 mm
C. 0.15 mm
D. 0.2 mm

Answer

C

Explanation

For a microscope, limit of resolution x`proplamda`
`therefore x_(2)/x_(1)=lamda_(2)/lamda_(1)=(6500"Å")/(5200"Å")`
`therefore x_(2)=0.12xx(5)/(4)=0.15`mm