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  4. Which unit is not for length?

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Q. Which unit is not for length?

VMMC MedicalVMMC Medical 2009

Solution:

1 angstrom $ =1\overset{\text{o}}{\mathop{\text{A}}}\,={{10}^{-10}}m $ 1 light year $ =1ly=9.46\times {{10}^{15}}m $ 1 parsec = 3.26 light year Nano is a prefix 1 nano $ ={{10}^{-9}}\,m $