A laser light beamed at the moon the takes `2.56 s` to return after reflection at the moon 's surface . How much is the radius of the lunar obit around the earth ?

A LASER is source of very intense, monochromatic, and unidirectional beam of light. These proparties of a laser light can be exploited to measure long distnae. The distance of the moon from the Earth hasl beenn already determine very precisly at the moon's surface. How much is the radius of the luuar orbit around the Earth?

A satellite of mass m is revolving around the Earth at a height R above the surface of the Earth. If g is the gravitational intensity at the Earth’s surface and R is the radius of the Earth, then the kinetic energy of the satellite will be:

A diffraction-limited laser of length l and aperture diameter d generates light of wavelength lambda . If the beam is directed at the surface of the Moon a distance D away, the radius of the illuminated area on the Moon is approximately

At what absolute temperature T is the root mean square speed of a hydrogen molecule is equal to its escape velocity from the surface of the moon? The radius of moon is R, g is the acceleration due to gravity on moon’s surface, m is the mass of a hydrogen molecule and k is the Boltzmann constant

Total time taken by a laser beam to return to the earth after reflection from the moon is 2.56 s. Calculate the distance of moon from the earth. Take velocity of light in vacuum =3xx10^8m//s.

A acceleration of moon with respect to earth is 0.0027 ms^-2 and the acceleration of anpple falling on earth's surface is about 10ms^-2 . Assume that the radius of the moon is one fourth of the eareth's radius. If the moon is stopped for an instant and then released, it will fal towards the earth. The initial acceleration of the moon toward the will be

Suppose the satellite is revolving at a height of 35780 km above the earth's surface with velocity 3.08 km/s . How much time the satellite will take to complete one revolution around the earth ?