16.1 nm is equal to

17.A student wishes to study the cell structure under a light microscope having 10 X eye piece and 45 X objective. For best resolution, the object should be illuminated by light

18.Svedberg was awarded Nobel Prize for development of

19.A chemical substance irradiated with ultraviolet rays emits visible light. It is called

20.A microorganism viewed under microscope with 40 X objective and 10 X eye piece measures 4000 μm. The same microorganism observed under dissection microscope with 10 X lens would measure