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    Did you mean Total Internal Reflection?
    Glossary Total Internal Reflection

    light reflects entirely within a medium at a critical angle

    Total Internal Reflection (TIR) occurs when a light wave traveling through a medium with a higher refractive index (like water or glass) hits the boundary of a medium with a lower refractive index (like air) at an angle greater than the critical angle, causing the light to be completely reflected back into the original medium rather than refracting through the boundary. This phenomenon is crucial in fiber optics, where it allows light to be efficiently transmitted over long distances with minimal loss.

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    1. Analyzing the laser-light reflection from human hair fibers Part1: Light components underlying the goniophotometric curves and fiber cuticle angles Research Portal (King's College London) · 2003
    2. Light scattering from human hair fibers ACM Transactions on Graphics · 2003 · 161 citations
    3. Light scattering from human hair fibers 2003 · 90 citations
    4. Studies of light scattering from ethnic hair fibers International Journal of Cosmetic Science · 2004 · 7 citations
    5. Investigation of hair dye deposition, hair color loss, and hair damage during multiple oxidative dyeing and shampooing cycles. PubMed · 2016 · 4 citations
    6. Cutaneous Clues in Systemic Disease: The Role of Dermatological Manifestations in Internal Medicine and Endocrinology IECCMEXICO · 2026
    7. Optical coherence tomography examination of hair 2014
    8. FDA declines approval of testosterone drug for third time 2013
    9. Alopecia: from clinic to preclinic and back Formuly farmacii · 2019 · 1 citations
    10. Analyzing the laser‐light reflection from human hair fibers. II. Deriving a measure of hair luster International Journal of Cosmetic Science · 2004 · 11 citations
    11. A Phase 1 Study to Investigate the Effects of Cortexolone 17α‐Propionate, Also Known as Clascoterone, on the QT Interval Using the Meal Effect to Demonstrate ECG Assay Sensitivity Clinical Pharmacology in Drug Development · 2021 · 2 citations
    12. A discourse on human hair fibers and reflections on the conservation of drug molecules International Journal of Legal Medicine · 1996 · 47 citations
    13. Human hair follicles operate an internal Cori cycle and modulate their growth via glycogen phosphorylase Scientific Reports · 2021 · 30 citations
    14. Skin, a mirror reflecting diabetes mellitus: A longitudinal study in a tertiary care hospital in Gujarat Indian Journal of Endocrinology and Metabolism · 2013 · 11 citations
    15. Attenuated Total Reflection Fourier Transform Infrared Spectroscopy Analysis of Human Hair Fiber Structure Applied spectroscopy · 2008 · 19 citations
    16. Internal structural changes in age‐related curved hair due to cyclical extension: An IR spectroscopy study International Journal of Cosmetic Science · 2025 · 1 citations
    17. Analyzing the laser-light reflection from human hair fibers. I. Light components underlying the goniophotometric curves and fiber cuticle angles. PubMed · 2003 · 3 citations
    18. Social rejection in minority groups and its impact on current and future mental health: a study in transgender people BMC Psychology · 2025 · 1 citations
    19. Resolution of paraneoplastic alopecia following surgical removal of a pancreatic carcinoma in a cat Journal of Small Animal Practice · 1999 · 52 citations
    20. Physical and mechanical properties of the hair shaft: A review of measurement techniques to verify the efficacy of cosmetic products Seven Editora eBooks · 2024
    21. Non-Invasive Techniques for Evaluating Alopecia Areata Mædica · 2023
    22. What′s new in cicatricial alopecia? Indian Journal of Dermatology, Venereology and Leprology · 2013 · 16 citations
    23. Fourier Transform Infrared Attenuated Total Reflection Analysis of Human Hair: Comparison of Hair from Breast Cancer Patients with Hair from Healthy Subjects Applied spectroscopy · 2005 · 42 citations
    24. Effect of Exercise Interventions on Metabolic, Reproductive and Mental Health in Overweight Women with Polycystic Ovary Syndrome Victoria University Research Repository (Victoria University) · 2021
    25. Innovative Teaching Strategies for Medical Students: Encouraging Reflection on Patient Experiences Through Creative Methods and Meaningful Connections Biomedical Journal of Scientific & Technical Research · 2025
    26. Baseline Neutrophil-to-Lymphocyte Ratio Stratifies Early Trichoscopic Response to Platelet-Rich Plasma–Based Regimens in Non-Scarring Alopecia: A Real-World Cohort with Internal Validation Using an Interpretable Neural Network Life · 2026
    27. Effect of shampoo, conditioner and permanent waving on the molecular structure of human hair PeerJ · 2015 · 37 citations
    28. Questionnaire Modifications and Alternative Scoring Methods of the Dermatology Life Quality Index: A Systematic Review Value in Health · 2021 · 13 citations
    29. Modeling Oxidative Stress–Linked Telogen Effluvium: A Monte Carlo Simulation Using Published Trichoscopy Norms and Cannabis Exposure Distributions 2025
    30. Advancements in Dermatological Imaging Modalities Indian Dermatology Online Journal · 2024 · 9 citations