Tag Archives: Refraction

EYE AND ITS VISION-BASIC CLINICAL SCIENCES

Both Light and Sound Have Oscillating Waves

Velocity Travels Through Vacuum? Wavelength Frequency
Light 186,000 miles/sec
(300,000 km/sec)
in vacuum		 Yes 400-700 nm 4 X 10^14
to 7 X 10 ^14
cycles/sec
Sound About 700 mph
(about 340 m/sec)
(1 mile per 5 seconds)
in air		 No .02 to 20 meters 20-20,000 cycles/sec
  • Sound and light are waves in which the amplitude oscillates with time
    • For pure tones or colors the oscillation is a sine wave with a fixed wavelength and frequency
    • The wavelength is the distance between 2 peaks of the wave
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REFRACTOMETER-BASIC CLINICAL SCIENCES

NAPA, CA - OCTOBER 9: Maria Kopra uses a refr...
Image by Getty Images via Daylife

A refractometer measures the extent to which light is bent (i.e. refracted) when it moves from air into a sample and is typically used to determine the index of refraction (aka refractive index or n) of a liquid sample.

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