Q. A major breakthrough in the studies of cells came with the development of electron microscope. This is because :
A) the resolution power of the electron microscope is much higher than that of the light microscope
B) the resolving power of the electron microscope is 200 – 350 nm as compared to 0.1 – 0.2 nm for the light microscope
C) electron beam can pass through thick materials, whereas light microscopy requires thin sections
D) the electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons
Explanation
[Solution from source] Electrons have a much shorter wavelength than light, so an electron microscope has far greater resolving power and shows fine cell structures. The option quoting 200–350 nm for the electron microscope swaps the values, and electron beams need very thin sections. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.