Forensic Physics: Applied Analysis

This mock is the medium-difficulty companion to Mock #6 (Forensic Physics: Foundations). Same eight FACT Forensic Physics syllabus sub-topics, same 30-question, 15-minute format — but at the application level. Where the foundations paper asked "what is X?", this paper asks "you have evidence X, what do you do, and what does the result mean?". Calculations from the Beer-Lambert law, glass-fracture direction-of-impact, paint-layer mismatch interpretation, likelihood-ratio arithmetic, formant-frequency comparison, CCTV photogrammetric speed estimation, fire-pattern interpretation, and the v = √(2gμd) speed-from-skid formula all show up.

It is pitched at second-year MSc forensic-science students at NFSU, LNJN-NICFS, GFSU and other Indian universities, FACT and FACT Plus aspirants who have the vocabulary down and now need to score on the applied paper, and UGC-NET candidates who want a calibration check before the exam. Pair this mock with #6: do #6 first, review the explanations, then attempt this one to see whether the foundational concepts have hardened into working knowledge.

Themes covered:

• Multi-evidence scene sequencing and the panchnama for digital + physical exhibits together
• Wet-weapon preservation and the consequences of broken chain of custody
• Beer-Lambert calculation; SEM-EDX interpretation (Pb-Sb-Ba GSR signature)
• Choosing the right instrument: GRIM for glass, GC-MS for unknowns
• The 3R rule applied to forced-entry direction; paint-chip layer mismatch interpretation
• Tool-mark and tyre-mark class vs individual characteristics
• Likelihood-ratio calculation (LR = 0.9 / 0.001 = 900) and posterior-odds combination
• 95% confidence band from QC SD measurements
• Formant-frequency comparison and intra- vs inter-speaker variability
• GSM codec band-limit effects on forensic voice analysis
• Sex / age inference from F0; falsetto disguise detection
• De-interlacing for CCTV plate readability; speed estimation from frame count
• DVR clock-skew documentation and the chain of custody
• IS 269 cement adulteration interpretation; NFPA 921 fire-pattern + ILR analysis
• Forensic palynology in soil comparison; SPR for wet-plastic latent prints
• v = √(2gμd) skid-distance speed; ABS intermittent skid marks and the EDR
• PDQ paint analysis as class-level evidence; tyre-mark class-vs-individual reporting

Each question carries a detailed 220+ word explanation citing standard references (Saferstein, Sharma, NFPA 921, ENFSI, ASTM E1588, IS 269 / IS 4031, Daily & Strickland, Bodziak, Hollien, ACPO, SWGDE, Aitken & Taroni, Bandey Fingermark Visualisation Manual). Allow 15 minutes; the explanations double as study notes. The next three mocks (#8 Evidence Collection & Pattern Analysis; #9 Instruments & Spectroscopy; #10 Voice, Video & Reconstruction) are the hard premium papers that complete the FACT Forensic Physics series.