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Special relativity — Question 31

Original QCE Vault practice · 1 mark

Q31 · Practice questionComplex familiar1 mark

QUESTION 31

A spacecraft has proper length

12.0\,\text{m}

. It passes Earth at

0.60c

. What length is measured by Earth observers?

(A)

7.2\,\text{m}

(B)

9.6\,\text{m}

(C)

12.0\,\text{m}

(D)

15.0\,\text{m}

ABCD

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