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Gravitation



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Physics    Newtonian Mechanics    Gravitation

The Gravitational Field:

The gravitational field around a mass exists at every point in space. When a particle of mass m is placed at a point where the gravitational field (g), has certain value then we can say that the particle is experiencing a force (= mg). In other words, the field exerts a force on the particle. Hence the gravitational field (g) is given by,

It can further be simplified and thus gives:

(a)

           

(b)

           
Figure (a) shows the gravitational field in a very large area where as figure (b) shows gravitational

Modern Developments in Gravitation:

The modern developments in gravitation are as follows:

     (1) Gravitational lensing is the phenomenon through which the light rays can be focused at a
           point. This is the corresponding gravitational effect as that of optics.

    (2) Gravitational waves have been detected in between a pair of stars.

    (3) Knowledge and awareness about black holes to advance research in this direction are the
          part of modern developments.


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