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
Numerical And Long Questions
A laser light beamed at the moon takes 2.56s and to return after reflection at the moon’s surface. What will be the radius of lunar orbit
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t = time taken by laser beam to go to the moon =
distance between earth and moon
= d = c × t/2
= 3×10⁸x 2.56/2
= 3.84 x 10⁸ m.