NEET 2026 — Physics solution

NEET2026Physics

The speed of light in vacuum is taken as unity. If light takes 6 min 40 s to reach the Earth from the Sun, the distance between the Sun and the Earth in new unit is :

A
$3 \times 1 0^{8}$
B
500
C
$3 \times 1 0^{10}$
D
400

Solution

Distance = speed $\times$ time. With $c = 1$ in new units and time $= 6 \times 60 + 40 = 400$ s,

Distance $= 1 \times 400 = 400$ units.

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