*NURSING > EXAM > 2024 ABO Exam Prep Part 4 - Lens Materials & Coatings New Full Exam Questions and Answers ( Included (All)
2024 ABO Exam Prep Part 4 - Lens Materials & Coatings New Full Exam Questions and Answers ( Included ) 100% Correct
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1. The speed of light in air divided by the speed of light in material Answer: Index ofrefraction 2. The weight in grams of one cubic centimeter of any given material Answer: Specific gravity 3. A... relative measure of dispersion or color distortion of a lens; a.k.a.V-valueAnswer: Abbe number 4. Index of refraction of CR-39 plastic Answer: 1.498 5. Specific gravity of CR-39 plastic Answer: 1.32 6. Abbe number of CR-39 plastic & crown glass Answer: 58 7. Index of refraction of crown glass Answer: 1.523 8. Specific gravity of crown glass Answer: 2.54 9. Lens material that is relatively strong against scratches/pits, is easilycleaned, resists corrosion, & is impact resistant Answer: Crown glass 10. Lens material made with silver halide crystals which respond to UV light;can also respond to changes in temperature Answer: Photochromic glass 11. Silver halide crystals in photochromic glass respond to this range of UVlight wavelengths Answer: 300-400 nm [Show More]
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