Physics Unit26: Special Theory of Relativity (id: c115812b9)

[单选题]
How fast would a rocketu;0fggrer v6b9 t):kf ship have to move to contract to half of 354-hgywpa.w:ibi jpits proper length (ww4.iih: p gy-apj35b as observed by a stationary object)?

A. $0.50 \; c$
B. $0.65 \; c$
C. $0.78 \; c$
D. $0.87 \; c$


参考答案:  D


本题详细解析: 暂无