Relative motion

Referes to motion travels at fast speed equals to speed of light or close to speed of light . There will be mass change with speed of travel which did not address by newton

Motion travels at speed close to speed of visible light

Speed

${\displaystyle \gamma ={\sqrt {1-{\frac {v^{2}}{C^{2}}}}}}$

Mass

${\displaystyle M=m_{o}(\gamma -1)}$

Motion travels at speed equals to speed of visible light

Speed

${\displaystyle \omega =\lambda f=C}$

Mass

${\displaystyle h=p\lambda }$

Elinstein's theory of relativity