Question

One parsec is equal to ______ light years.

• A. 2.36
• B. 3.62
• C. 6.32
• D. 3.26

Answer 1

The correct option is D 3.26

Parsec and light years are used in astronomy to measure large distances.

$1pc\approx 3\times {10}^{16m}$
$1ly\approx 9.5\times {10}^{15}m$
$⟹\frac{1pc}{1ly}=\frac{3\times {10}^{16}}{9.5\times {10}^{15}}$
$1pc\approx 3.2ly$