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PART - 1 CH - 1 Units and Measurements — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsPART - 1 CH - 1 Units and Measurements1 Mark
MCQ
Value of one light year distance:
  • A
    9.46 x 1010 km
  • ✓
    9.46 x 1012 km
  • C
    9.46 x 1012 m
  • D
    9.46 x 1015 cm
✓

Answer

Correct option: B.
9.46 x 1012 km
B
$\begin{aligned} \text { One light year } & =3 \times 10^8 \times 365 \times 24 \times 60 \times 60 \mathrm{~m} \\ & =9.46 \times 10^{15} \mathrm{~m} \\ & =9.46 \times 10^{12} \mathrm{~km}\end{aligned}$

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