NCERT Solutions for Class 11 Science Properties of matter 1
Important Board Questions
Dimension and Measurement
NCERT Books for Session 2022-2023
CBSE Board and UP Board
One Marks Question
A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the sun and the earth in terms of the new unit if light takes 8 min and 20 s to cover this distance.
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Speed of light in vacuum, c = 1 new unit of length s⁻¹
t = 8 min. 20 sec, = 500 s
x = ct = 1 new unit of length s⁻¹× 500s
x = 500 new unit of length