Unit
Notes - 1
1. Define the
following terms:
Numerical aperture
Amount of light
entering objective
Refractive index
The speed at
which light travels in air divided by speed light travels through the substance
Resolving power
The useful
limit of magnification
Depth of field
The capacity of
the objective lens to focus in different planes at the same time
Chromatic aberrations
When different
wavelengths are not bent the same amount thus not focused