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Physics - Unit & Dimension Question with Solution | TestHub

PhysicsUnit & DimensionMiscellaneousEasy2 minPYQ_2026

PhysicsEasysingle choice

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 :NEET 2026 (Cancelled)

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Answer:

Solution:

Speed of light in vacuum, $c = 1$ unit/s.

Time taken by light to reach the Earth from the Sun, $t = 6$ min $40$ s.

Converting time into seconds:

$t = 6 \times 60 + 40 = 360 + 40 = 400$ s.

Distance between the Sun and the Earth is given by:

$d = c \times t$

$d = 1 \times 400 = 400$ new units.

Answer: $400$

Stream:NEETSubject:PhysicsTopic:Unit & DimensionSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2026

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