Answer :

Given,


Time taken by laser to reflect back from moon to earth = 2.56 s


We know that,


Speed of the light in vacuum = 3×108 m/s


Radius of the lunar orbit (r) = distance between Earth and Moon (d)


Times taken for laser beam to reach moon = 0.5×2.56 = 1.28 s


r = d = speed of light in vacuum × Time taken


= 3×108 × 1.28 m


= 3.84×105 km


Hence, the radius of the lunar orbit is, 3.84×105 km.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

In an experiment Physics - Exemplar

(a) How many astrPhysics - Exemplar

Einstein’s mass -Physics - Exemplar

A LASER is NCERT - Physics Part-I

Estimate thNCERT - Physics Part-I

The unit of lengtNCERT - Physics Part-I

A SONAR (soNCERT - Physics Part-I

It is a well-knowNCERT - Physics Part-I

Just as preNCERT - Physics Part-I

Which of the follPhysics - Exemplar