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INTRODUCTION AND ELEMENTARY THEORY
11 Refraction at a Spherical SurfaceNotation
17 Two Thin Lenses in Contact
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absorption amplitude angle of incidence aperture aperture stop astigmatism beam centre chromatic coherence colour components conjugate corresponding crystal detector diffraction direction discussion dispersion distance disturbances effect elliptically emergent employed entrance pupil equal equation etalon exit pupil eyepiece Fabry-Perot field of view film flux focal length focal plane focus frequency fringes given gives grating Hence illumination image plane incident light instrument intensity interference interferometer lens lenses limit of resolution luminous luminous intensity magnification maxima maximum measured method microscope mirror monochromatic Newton's rings normal observed obtained optic axis optical path optical system parallel paraxial path difference pattern perpendicular phase difference plane polarized plane wave plate point source polarized light position prism reflected refractive index region resolving power result rotation screen seen shown in Fig slit Snell's law spectral line spectrometer spectrum spherical aberration telescope thickness thin lens vector velocity wavefront wavelength width zero zones