北京新航道为考生指导SAT考试并且为需要的学子提供SAT培训。SAT备考尤其重要，下面我们为考生整理了一些关于SAT2物理常用术语，希望帮助考生备考SAT提供一些帮助和借鉴。

 

　　The following list defines all of the bold-faced words you encountered as you read this book.

 

　　C

 

　　Concave mirror

 

　　A mirror that is curved such that its center is farther from the viewer than the edges, such as the front of a spoon. Concave mirrors reflect light through a focal point.

 

　　Conduction

 

　　Heat transfer by molecular collisions.

 

　　Conservation of Angular Momentum

 

　　If the net torque acting on a rigid body is zero, then the angular momentum of the body is constant or conserved.

 

　　Conservation of momentum

 

　　The principle stating that for any isolated system, linear momentum is constant with time.

 

　　Constant of proportionality

 

　　A constant in the numerator of a formula.

 

　　Constructive interference

 

　　The amplification of one wave by another, identical wave of the same sign. Two constructively interfering waves are said to be “in phase.”

 

　　Convection

 

　　Heat transfer via the mass movement of molecules.

 

　　Convex lens

 

　　Also called a converging lens, a lens that is thicker in the middle than at the edges. Convex lenses refract light through a focal point.

 

　　Convex mirror

 

　　A mirror that is curved such that its center is closer to the viewer than the edges, such as a doorknob. Convex mirrors reflect light away from a focal point.

 

　　Cosine

 

　　The cosine of an angle in a right triangle is equal to the length of the side adjacent to the angle divided by the length of the hypotenuse.

 

　　Crest

 

　　The points of maximum displacement along a wave. In traveling waves, the crests move in the direction of propagation of the wave. The crests of standing waves, also called anti-nodes, remain in one place.

 

　　Critical angle

 

　　For two given media, the smallest angle of incidence at which total internal reflection occurs.

 

　　Cross product

 

　　A form of vector multiplication, where two vectors are multiplied to produce a third vector. The cross product of two vectors, A and B, separated by an angle, , is , where is a unit vector perpendicular to both A and B. To deine which direction points, you must use the right-hand rule.

 

　　Cycle

 

　　In oscillation, a cycle occurs when an object undergoing oscillatory motion completes a “round-trip.” For instance, a pendulum bob released at angle has completed one cycle when it swings to and then back to again. In period motion, a cycle is the sequence through which a system once during each oscil-lation. A cycle can consist of one trip up and down for a piece of stretched string, or of a compression followed by a rarefaction of air pressure for sound waves.

 

　　上面就是我们列举的SAT2物理常用术语，大家在备考SAT一定要对词汇方面有更多更加详细的准备。最后，提醒大家，在备考时一定要自己多查看一些资料以及相关讯息，这样考试的时候就能轻松应对。祝各位考生考出好成绩。