# Shared Flashcard Set

## Details

Physics Ch. 8 - Light and Optics
MCAT
16
Physics
06/01/2016

Term
 What is the shortest wavelength of color? The longest?
Definition
 violet is shortest. red is longeest
Term
 What equation relates the speed of light to frequency and wavelength
Definition
 c = fλ
Term
 What is the visible spectrum for humans?
Definition
 about 400 nm to 700 nm
Term
 convex mirrors vs concave mirrors
Definition
 diverging mirrors, the center of curvature and the radius of curvature are behind the mirror converging mirrors, the center of curvature and the radius of curvature are in front of the mirror
Term
 How is focal length related to the radius of curvature for spherical mirrors?
Definition
 f = r/2
Term
 what is the equation for magnification?
Definition
 m = -i/o m is magnification, it is dimensionless i is the distance between the mirror/lense and the image o is the distance between the object and the mirror/lense A negative magnification signifies an inverted image A positive value signifies an upright image
Term
 What equation relates the distances between image, object, mirror/lense and focal point?
Definition
 [image]
Term
 real vs virtual image
Definition
 If an image is in front of the mirror it will have a positive distance and is real. If an image is behind the mirror it will have a negative distance and is virtual. The convention is the opposite in lenses. The real side is where the light rays are reflected or refracted and where the image should be
Term
 Snell's law
Definition
 states that there is an inverse relationship between the index of refraction and the sine of the angle of refraction  [image]
Term
 How can you determine the speed of light when it isn't in a vacuum?
Definition
 n = c/v n is the index of refraction, dimensionless c is the speed of light in a vacuum, m/s v is the speed of light in the medium, m/s
Term
 What is the critical angle and how can it be determined?
Definition
 the critical angle is when the refracted angle equals 90 degrees, when the angle of incidence is greater than this angle a phenomenon in which all the light incident on a boundary is reflected back into the original material, this is called total internal reflection θc = sin-1(n2/n1) θc is the critical angle n1 is the medium the light ray starts in n2 is the medium the light ray is going into
Term
 What is the equation to be used when the thickness of a lens can't be ignored?
Definition
 [image] n is the index of refraction of the lens material r1 is the radius of curvature of the first lens surface r2 is the radius of curvature of the second lens surface
Term
 power of a lens
Definition
 P = 1/f P is in diopters P is positive for a converging lens and negative for a diverging lens
Term
 How to determine focal length, power and magnification in multiple lens systems
Definition
 1/f = 1/f1 + 1/f2 + 1/f3 + ... P = P1 + P2 + P3 + ... m = m1 + m2 + m3 +...
Term
 planed polarized light
Definition
 all of the light rays have electric fields with parallel orientation in this kind of light
Term
 diffraction
Definition
 the bending and spreading out of light waves as they pass through a narrow slit
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