Syllabus for the post of Scientific Officer – Physics Section in Forensic Science Laboratory (Police Department) Karnaaka
1. The metric system – Unit of measurement – SI Units, Measuring devices, Accuracy, sensitivity and precision of measuring instruments. Errors in measurement, Significant figures.
2. Mechanics – Laws of motion, Linear and rotational motion, Friction, Elasticity.
3. Magnetism and Electricity – Basic Properties.
4. Glass – Types of glass and their composition, glass fractures, cone- fracture, rib marks, hackle marks, backward fragmentation. colour and fluorescence, physical matching, density comparison, physical measurement, refractive index by refractometer, elemental analysis.
5. Holography – Importance of coherence, Principle of holography and characteristics, Recording and reconstruction, classification of hologram and application, non-destructive testing. Inline hologram, off axixhologram. Fourier hologram, image hologram.
6. Laser – Production, properties of laser beams such as intensity, monochromaticity, coherence, directionality and brightness. Basic laser systems Gas Lasers : (1) Molecular gas lasers – CO2 laser & N2 (2) Ionic gas laser – Ar+ laser (3) Gas dynamic laser (4) high pressure pulsed gas laser. Solid State Laser – (1) Nd:YAG laser (2) Nd:Glass laser. comparison of performances (3) Tunable, solid state laser – Ti sapphire laser; Alexandrite laser. Chemical Laser- HF laser, HCl laser, COIL. Excimer laser, colour centre laser, free electron laser; semiconductor diode laser. Laser Beam Propagation – Laser beam propagation, properties of Gaussian beam, resonator, stability, various types of resonators, resonator for high gain and high energy lasers, Gaussian beam focusing.
7. Basic concept of Spectroscopy – Atomic, molecular spectroscopy, imaging spectroscopy, Interaction of radiation with matter and its consequences, Reflection, abosrption, transmission, scattering, emission, fluorescene, phosphorescence.
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