Light Inside the Eye. The vitreous humor, a transparent, gelatinous fluid that fills most of the eyeball, has an index of refraction of 1.34. Visible light ranges in wavelength from 380 nm (violet) to 750 nm (red), as measured in air. This light travels through the vitreous humor and strikes the rods and cones at the surface of the retina. What are the ranges of (a) the wavelength, (b) the frequency, and (c) the speed of the light just as it approaches the retina within the vitreous humor?
Chapter 5 Notes The bigger the amplitude of pressure variations is, the bigger the energy that is being carried by the waves Energy carried by the wave is proportional to a square of amplitude- E- A^2 Power is the energy point per unit time P= E/T The unit of Power is the Watt (W) Power as a result, characterizes the ability of our source to emit waves but says little about how much energy is caught by a particular receiver Intensity is the power delivered to a particular point or l= P/s The intensity does not have special units and is measured just in units of power divided by units of area W/m^2 Intensity at any given point depends on the amplitude of a wave: proportional to the square of amplitude Increasing a distance from a source obviously decreases the loudness of the s
