Optics is a free app for college students to learn Optical Physics from a concise representation of each topic and practise the subject and assess the preparation through tests and MCQ quizzes.

*FEATURES OF OPTICS APP*
-Free and offline content
-Keyword-based search facility
-Clear and concise representation
-Colourful graphs, illustrations and diagrams
-Numerical examples
-Easy (Randomized) Question-paper setter
-(Randomized) MCQ Quizzes with negative marking and a timer

*TOPICS COVERED*
1. Fermat's Principle and its Applications: Geometrical optics, Refractive index, Optical path, Fermat’s principle, Law of reflection and Law of refraction from Fermat's principle, Refraction at a spherical surface, Lagrange-Helmholtz invariant, Abbe sine condition

2. Theory of Image Formation: Lensmaker's formula, Angle of deviation, Cardinal points, Focal points and focal planes, Principal points and principal planes, Nodal points, Equivalent lens, Constructing image from the knowledge of cardinal points, Newton's formula and Guass' formula, Positions of cardinal points

3. Aberration in Images: Optical aberrations, Defocus aberration, Spherical aberration, Astigmatic aberration, Comatic aberration, Field curvature aberration, Distortion aberration, Chromatic aberration, Aplanatic points of a sphere, Location of aplanatic points for a spherical surface, Aplanatic lens, Oil immersion objective, Spherical aberration in spherical mirrors, Chromatic aberration free arrangement

4. Optical Instruments: Human eye, Visual angle and perception of size, Simple microscope, Compound microscope, Refracting telescope, Aperture stop, entrance pupil and exit pupil, Angle of view (AFOV) and field of view (FOV), Condition of minimum spherical aberration, Condition of minimum chromatic aberration, Huygens eyepiece, Ramsden eyepiece

5. Interference: Constructive and Destructive interference, Coherent and Incoherent source, Sustained interference, Young's double slit experiment, Fresnel's biprism experiment, Displacement of fringes due to thin plate, Stokes' relations, Phase change on reflection, Lloyd's single mirror arrangement, Cosine's law, Thin film interference, Wedge-shaped thin film interference, Non-reflecting film, Anti-reflection coating, Fizeau fringes, Haidinger fringes, Newton's ring experiment

6. Interferometer: Michelson interferometer, Multiple beam interference, Multiple beam interferometer, Fabry-Perot Etalon, Fabry-Perot Interferometer, Quantities related to Fabry-Perot Interferometer

7. Diffraction: Diffraction of waves, Fraunhofer diffraction, Fresnel diffraction, Superposition of n simple harmonic motions, Single slit Fraunhofer diffraction, Fraunhofer diffraction in rectangular slit, Fraunhofer diffraction in circular aperture, Double slit Fraunhofer diffraction, N-slit Fraunhofer diffraction, Diffraction grating

8. Fresnel Diffraction: Huygens-Fresnel principle, Huygens-Fresnel diffraction integral, Fresnel zones, Fresnel diffraction by circular aperture, Fresnel diffraction by circular disc, Zone plate, Diffraction by straight edge

9. Polarization: Polarization of light, Linear/Circular/Elliptical polarization, Jones vector, s-- and p-- polarization, Fresnel coefficients, Polarizer, Wire-grid polarizer, Polaroid, Malus' law, Optical activity, Birefringence, Double refraction, Nicol prism, Index ellipsoid, Refractive indices in anisotropic media, Waveplate or retarder, Jones matrix

10. Other Topics: Laser, Spatial/temporal coherence, Coherence time/length, Absorption - Emission - Stimulated emission, Einstein's A and B coefficients, Laser components, Ruby laser, Helium-neon laser, Semiconductor laser, Optical fibre, Numerical aperture, Angle of acceptance, Attenuation coefficient, V number or normalized frequency, Holography etc.

*CONTACT*
Please report an error or a bug in the app at drbasak.phy@gmail.com.

DrBasak Physics

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