# Shared Flashcard Set

## Details

Chap 7 Light & Sound Formulas
14
Physics
01/09/2014

Term
 V=√k/Ρ
Definition
 speed of sound
Term
 V=(331.5+.606)*T
Definition
 speed of sound in air
Term
 B=log(I/I0) I0=1.0 x 10-12
Definition
 bels
Term
 λ=4 x L/N N=odd number
Definition
 standing wave in closed tube
Term
 λ=2L/N N=any number
Definition
 wave length in open tube
Term
 fbeat=|fwave 1-fwave 2|
Definition
 beats
Term
 fobserved =[(Vsound±Vobserver)/(Vsound±Vsource)]*ftrue
Definition
 Doppler Effect
Term
 n1(sinΘ1=n2(sinθ2)
Definition
 Snell's Law
Term
 n=c/vlight in medium
Definition
 index of refraction
Term
 sinΘ1≥n2/n1
Definition
 condition for total internal reflection
Term
 1/so + 1/si = 1/f
Definition
 Mirror Equation
Term
 m = -si/so
Definition
 Magnification Equation
Term
 1. The object distance (so) is always positive   2. The focal length (f) of a concave mirror is positive; the focal length of a convex mirror is negative.   3. If the image distance (si) is positive it is a real image and is on the same side of the mirror as the object.  If the image distance is negative, it is a virtual image on the other side of the mirror.
Definition
 Sign Conventions for the Mirror Equation
Term
 1. The object distance (so) is always positive.   2. The focal length (f) of a converging lens is positive; the focal length of a diverging lens is negative.   3. If the image distance (si) is positive, it is a real image and is on the opposite side of the lens as compared to the object.  If the image distance is negative, it is a virtual image and is on the same side of the lens as the object.
Definition
 Sign Conventions for Equations (7.11) When Applied to Lenses
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