Q. Two points, separated by a distance of 0.1 mm, can just be inspected on a microscope when light of wavelength 6000 $\mathring{\mathrm{A}}$ is used. If the light of wavelength $4800\mathring{\mathrm{A}}$ is used, the limit of resolution is
A) 0.8 mm
B) 0.08 mm
C) 0.1 mm
D) 0.04 mm
Explanation
(b) $\frac{\lambda_{2}}{\lambda_{1}} = \frac{4800}{6000} = 0.8$
New resolution limit $= 0.8 \times 0.1\ $mm = 0.08 mm
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.