(II) An aquarium filled with water has flat glass sides whoseindex of refraction is 1.56. A beam of light from outsidethe aquarium strikes the glass at a 43.5 angle to the perpendicular(Fig. 32-49). What is the angle of this light ray whenit enters (a) the glass, and then(b) the water? (c) What would be the refracted angle if the ray entered the water directly?FIGURE 32-49 44.
• System o Objectsinit o Forcesonitfromoutside(external) Fd Forceand Ability“todo Positivework Displacementare stuff”increases done parallel Fd Forceand Ability“todo Negativework Displacementare stuff”decreases done anti-parallel F Forceand Ability“todo Zeroworkdone Displacementare stuff”is d perpendicular uncharged W=±Fd Joules=Newtonsmeters (J)=(N)(m) Work=Forcedisplacement • ASystemHas: o Theobjectbeingdisplaced. o
