False. Newton said gravity was a force. A force cannot act on light. A force would also lead to different masses falling at different rates.

Slight correction. On earth, the effects of Newtonian Mechanics (Laws of Motion and Gravitation) are virtually indistinguishable from GR.

Newtonian Gravitation would cause light to bend around extremely massive objects, but only half as much as GR (as GR includes time dilation). Newton himself predicted it as he believed in the corpuscular theory of light - not so far off photons!

And finally, Newtonian Gravitation

*causes a force proportional to mass*, ie an acceleration.

Don't write old Sir Isaac's mechanics off yet, it is what is used for almost all calculations, even in orbital mechanics - GR is too complicated to use when not absolutely necessary.

GR shows the range of applicability of Newton's Laws (

*v << c and mass "not too massive"*) and provides a correction term where necessary.

In most cases, time dilation is the first significant effect, simply because time can be measured so precisely.

Keep GR for cosmic scale and particle accelerator problems.