NEET2026Physics-Units and Measurements
NEET 2026 Physics New Units MCQ Question
Type: MCQ-conceptual-Easy-Class 11
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 × 10⁸
B
500
C
3 × 10¹⁰
D
400
Correct Answer
Option D
Detailed Explanation
Time taken by light is 6 min 40 s, which is 400 s. In the new system, distance d = vt = 1 × 400 = 400.
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