High index of refraction - Study guides, Class notes & Summaries

SPI Practice Questions Answers A Which of these terms means 'many gray shades'? A wide dynamic range B bistable C high contrast D highly compressed signal E few choices ️A wide dynamic range Which of the following will result in the highest mechanical index? A high intensity and high frequency B low frequency and high signal amplitude C low intensity and low frequency D high frequency and low power ️B low frequency and high signal amplitude mechanical index is inver...

ETA-I Study Guide (Fiber Optics Installer Certification) (FOI)An optical fiber works based off of a principle known as; - correct answer Total Internal Reflection. The bending of light as it passes from one transparent material into another which has a different refractive index is what? - correct answer Refraction. Light is electromagnetic radiation in the wavelength range including visible, ultraviolet, X-rays and _______________. - correct answer Infrared. What are the three parts...

The basic definition of a prism may be expressed mathematically as: - 1cm/1m=1 prism Prentice's Rule states that the amount of induced prism equals to - Power of the lens times the decentration in millimeters divide by 10 (prism= F x dec (mm) divided by 10) A minus lens gets ________ the closer to the eye. - stronger Axis is _______________________. - a notation of position in relation to the cornea and the corrective lens. Axis notations have no value. Decentering a minus lens outward w...

Prentice Rule - ANS (Power x distance in mm) /10 Cornea index of refraction - ANS 1.37 Tear Film, Vitreous index of refraction - ANS 1.33 Crystalline lens index of refraction - ANS 1.42 Optical Standard index of refraction - ANS 1.53 Crown Glass index of refraction - ANS 1.523 High index of refraction - ANS 1.74 CR-39 index of refraction - ANS 1.49/1.50 Poly index of refraction - ANS 1.586 Air - ANS 1.00 How fast does light travel throu...

ABO Study Guide Questions with Verified Answers 2024 Prentice Rule Correct Answer: (Power x distance in mm) /10 Cornea index of refraction Correct Answer: 1.37 Tear Film, Vitreous index of refraction Correct Answer: 1.33 Crystalline lens index of refraction Correct Answer: 1.42 Optical Standard index of refraction Correct Answer: 1.53 Optical Standard index of refraction Correct Answer: 1.523 High index of refraction Correct Answer: 1.74 CR-39 index of refraction Correc...

Because children have a high degree of focusing ability, your doctor might want to temporarily relax the eyes muscles. This procedure is known as what? - Cycloplegic refraction What lens style is also referred to as a "no line bifocal"? - Varifocal or Progressive For hyperopes under the age of 40, what is a common symptom after long periods of reading? - Blurred vision at distance Can scratches on spectacle lenses be polished out? - No: furthering polishing would change the index of re...

When taking seg height measurements, which of the following situations could result in a parallax error? - ANSWER Patient sitting/ dispenser standing erect Which of the following is not significant in identifying the problem of vertical imbalance? - ANSWER Patient's age Which of the following elements is NOT critical when determining vertical imbalance? - ANSWER Lens power in the 180 degree meridian A prism will displace the object being viewed towards its ________. - ANSWER Apex A ...

ATT Week 11 Test (FC) What causes refraction? - A change in the speed of light. What is the most common optical detector? - Photo Diodes. __________ determines the color of light. - Wavelength What affects a detectors responsivity? - Changes in wavelength. The range of frequency that an optical fiber cable has is known as___________. - Bandwidth What optical fiber cable is made of several concentric layers? - Multimode graded-index What is a superheterodyne good for? - Extre...

The amount of reflection of each surface of CR-39 lenses is approximately - 4% The absorption of light in lenses is classified by two variables. What are they? A. base curve and thickness B. index of refraction and thickness C. thickness and lens transmission D. tint and lens transmission - D. tint and lens transmission The denser the tint in a lens A. the greater the transmission of light through the lens B. the greater internal reflections in the lens C. the less transmission of light...

Medium used to send information - Answer light What are the four parts of a fiber optic data link - Answer transmitter, optical fiber, connectors/splices, receiver fiber optic transmitter has which of the following functions - Answer converts the electrical input signal to an optical signal Fiber optic systems used what three type of optical sources - Answer LEDs, lasers, VCSEL(vertical cavity surface emitting lasers) fiber optic receiver performs which of the following functions? - ...