JEE Main 2026 · 8 Apr · Shift 2 · Physics Q26

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PhysicsSingle correct+4 / -1Question 26 of 75

A new unit ( $\alpha$ ) of length is chosen such that it is equal to the speed of light in vacuum. What is the distance between Venus and Earth in terms of $\alpha$ units if light takes 6 min. 40 s to cover this distance ?

200\alpha

400\alpha

300\alpha

500\alpha

Answer and worked solution

Official answer: B

Time. 6 min 40 s is 400 s. One α is the distance light travels in 1 s, so the distance is $400\alpha$ .

(B)

Topics:SI units and systems of units

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JEE Main 2026 · 8 Apr · Shift 2, Physics question 26