1.

A new unit of length is chosen such that the speed of light in vscuum is unity. What is the distance between the sun and the Earth in terms of the new unit if light takes 8 min and20 s to cover this distance.

Answer»

100 new unit
300 new unit
500 new unit
700 new unit

Solution :Speed is UNITY = 1 unit/SEC
Time = 8 min and 20 sec = 500 sec
Distance b/w SUN and earth = Speed `xx` Time
= 1 `xx` 500 = 500 unit


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