An Object of Rest Length $L_{R}$ Moving at One-Half the Speed of Light Will Have a Speed

Multiple Choice

An object of rest length $L_{R}$ moving at one-half the speed of light will have a length equal to:

A) $\frac{1}{2} L_{R}$
B) $\frac{3}{4} L_{R}$
C) $\left(\frac{1}{2}\right) ^{1 / 2} L_{R}$
D) $0.87 L_{R}$
E) $\frac{1}{4} L_{R}$
F) Other (specify)