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Aberrations
Achromatic Lenses
Achromatism in Prism
Anderson Light Method
Angular Chromatic Dispersion
Anomalous Dispersion
Aplanatic Lens
Aplanatic Points Surface
Astigmatism
Atom Bohr Model
Atom De Broglie Model
Atom Rutherford Model
Atom Thomson Model
Babinet Compensator
Binocular Microscope
Bioquartz
Biot Polariscope
Blue Color of Sky
Bradley Aberration Method
Bragg Xray Spectrometer
Bravais Space Lattices
Brewster Angle Polarization
Brewster Window
Broad Source Necessity
Bunsen Flame
Carbon Arc
Cauchy Dispersion Formula
Chromatic Aberration
Chromatic Aberration in Lens
Circle of Least Confusion
Circular Aperture Diffraction
Classical Mechanics Inadequacy
Coherent Sources
Comatic Aberration
Compound Microscope
Compton Effect
Concave Reflecting Grating
Cornu Spiral
Curvature of Field
Depth of Focus
Deviation by Thin Lens
Dichroism
Diffraction
Diffraction of X Rays
Direct Vision Spectroscope
Dispersion by Prism
Dispersion Electron Theory
Dispersion without Deviation
Dispersive Power
Dispersive Power of Grating
Distortion
Doppler Effect in Light
Double Image Polarizing Prisms
Double Refraction
Eagle Mounting
Echelon Grating
Electromagnetic Spectrum
Electromagnetic Waves
Electron Microscope
Elements of Crystal Structure
Emission and Absorption Spectra
Emission Spectra Classification
Epidiascope
Eye Ring of Compound Microscope
Fermat Stationary Time
Fibre Optics
Fizeau Light Velocity Method
Flicker Photometer
Fluroscent Lamps
Foucault Rotating Mirror Method
Fresnel Biprism
Fresnel Integrals
Fresnel Mirrors
Fresnel Rhomb
Galileo Telescope
Haidinger Fringes
Half Shade Polarimeter
Half Wave Plate
Haloes
Heinsberg Uncertainty Principle
Helmholtz Relation
Holography
Huygens Eyepiece
Hydrogen Spectral Atom
Hydrogen Spectrum Theory
Illumination Photometer
Infra Red Spectrum
Intensity of Illumination
Interference Analytical Treatment
Interference and Diffraction
Interference Filter
Interference Fringes Types
Interference of light
Interference of Light Young Experiment
Inverse Square Law
Jamin Refractometer
Kerr Cell Method
Laser
Lateral Transverse Magnification
Lens Aberrations Theory
Lippich Polarimeter
Lippmann Color Photography
Littrow Mounting
Lloyd Single Mirror
Longitudinal Magnification
Lorentz Transformations
Luminiferous Ether
Malus Light Intensity Law
Maxwell Electromagnetic Field
Mercury Arc Lamp
Mercury Vapour Lamp
Michelson Interferometer
Microscope Resolving Power
Microscopes
Miller Indices
Motion in Waves
Nature of Light
Neon Lamps Geissler Tubes
Newton Corpuscular Theory
Newton Rings
Nicol Prism
Nodal Points
Nodal Slide
Non Reflecting Films
Numerical Aperture
Oblique Incidence
Oculars
Optical Activity
Optical Cardinal Points
Optical Instruments
Origin of Wave Theory
Paschen Mounting
Phase and Path Mounting
Phase Contrast Microscope
Photo Elasticity
Photo Electric Effect
Photo Voltaic Photometer
Photographic Camera
Photometer
Piezoelelectric Grazing
Plane Diffraction Grating
Plane of Polarization
Polarization by Reflection
Polarization by Refraction
Power of a Lens
Poynting Vector
Primary Rainbow
Principal Foci
Principal Maxima Intensity
Principal Points and Planes
Prism and Grating Spectra
Prism Binoculars
Prism Resolving Power
Pulfrich Refractometer
Quarter Wave Plate
Ramsden Eyepiece
Rectilinear Propagation of Light
Reducing Spherical Aberration
Reflected Light Interference
Reflecting Power Mirrors
Refracting Astronomical Telescope
Refraction at Concave Surface
Refraction Through Concave Lens
Refraction Through Convex Lens
Refraction Through Lens
Refraction Through Prism
Refractive Index Optical Path
Relativity Einstein Theory
Romer Astronomical Method
Rotating Mirror Null Method
Rowland Mounting
Secondary Rainbow
Seven Crystal Systems
Sextant
Simple Harmonic Wave
Simple Microscope
Sodium Lamp
Solar Spectrum
Sources of Light
Specific Rotation
Spectra Diffraction Grating
Spectral Lines Overlapping
Spectrometer
Spectrum
Spherical Aberration in Lens
Spherical Aberration Single Surface
Spherical Surfaces Refraction
Split Lens Modification
Standard Candle
Standard Waves in Light
Stellar Interferometer
Telephoto Lens
Telescope Resolving Power
Telescopes
Terrestrial Telescope
The Sign Convection
Theory of Interference Fringes
Third Order Theory
Transmission Coefficient
Transverse Wave Polarization
Tunnel Experiment
Types of Fringes
Ultra Microscope
Ultra Violet Spectrum
Unit Cell Space Lattice
Velocity of Wireless Waves
Vibrating Particle Total Energy
Virtual Image at Infinity
Visibility of Fringes
Visual Angle
Wavelength and Crystal Structure
Width of Principal Maxima
Zeeman Effect
Zone Plate

Thermodynamics

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Littrow Mounting

The littrow mounting is illustrated in fig. Large plane reflecting gratings are mounted this way, G is a plane reflection grating, P is a photographic plate, S is a slit and L is a large achromatic lens. The principle of Littrow mounting is similar to that of Eagle mounting. The achromatic lens L serves two functions. It renders the incident light from the slit parallel as well as it focuses the diffracted beam on P. Thus, it serves both as a collimating lens and a telescope objective.