# Shared Flashcard Set

## Details

Physics- Light and Optics
MCATs
20
Physics
07/10/2012

Term
 electromagnetic (EM) wave def.
Definition
 composed of oscillating electric and magnetic feilds. Generatd by an oscillating electric charge. Are transervse waves.
Term
 polarization of wave
Definition
 direction that wave's electric feild oscillates
Term
 speed of light in vaccum eq.
Definition
 c = 3 x 108 m/s
Term
 visible light spectrum
Definition
 ROYGBV 700nm-400nm
Term
 Photon Energy equation
Definition
 E = hf = h (c/λ)   h- Planck's constant
Term
Definition
 it travels like wave but interacts with matter like particle
Term
 Law of Reflection
Definition
 angel of reflection equal to angel of incidents
Term
 angel of refraction
Definition
 at angel to line perp to media
Term
 index of refraction eq.
Definition
 n=c/v   n-index of refraction c- speed of light in a vacuum v- speed of light in a medium
Term
 equation to determine refractive index between materials
Definition
 n1sinθ1=n2sinθ2   n-refractive index
Term
 Explain the circumstances necessary to have total internal reflection occur.
Definition
 when light tries to go from a medium of high refractive index to lower refractive index and it's angle of insidence is greater than the critical angel.
Term
 critical angle for total internal reflection eq.
Definition
 sinθcrit = n2/n1
Term
 diffraction def.
Definition
 redistrubution of waves intensity when it encounters an obstrucution
Term
 Polarized light vrs. normal light
Definition
 while beams of normal light would vibrate in all planes, the direction of polarized light has been restricted
Term
 dispersion def.
Definition
 diff frequencies have varrying wave speed. ie white light dispersing into rainbow.
Term
 how does image appear in a plane mirror?
Definition
 when object infront, image behind, same size, equal distance and upright
Term
 how does an image appear in a concave mirror?
Definition
 a real image, inverse, same side as object.
Term
 how does an image form in a convex mirror?
Definition
 virtual image formed upright on opp side of object.
Term
 mirror/lense eq.
Definition
 1/o +1/i = 1/f   o-objects distance (always +) i - image distance (+ if same side as observer) f - focal length ( + if same side as observer)
Term
 if optical power P of lens is found through eq. P=1/f where f is focal length in meters, whats the power of the lens if the distance from the eye is 2.0cm?
Definition
 P=1/2 x10-2m = 50
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