Define numerical aperture.

Derive the equation for acceptanc angle and numerical aperture, of optical fiber. Acceptance angle in optical fibre:

Derive the equation for acceptance angle and numerical aperture, of optical fiber. Acceptance angle in optical fibre:

An electron microscope uses electrons accelerated by a voltage of 50 kV. Determine the de Broglie wavelength associated with the electrons. If other factors ( such as numerical aperture, etc. ) are taken roughly to be the same, how does the resolving power of an electron microscope compare with that of an optical microscope which uses yellow light ( lambda_(y) = 5.9 xx 10^(-7) m ) .

Define Ampere :

Define enzymes.