# Physics Course/Relativity

## Relativity

According to Newton Mass of any moving object remains the same regardless of speed travel . According to Einstein any moving object has Mass changes with speed travel

## Relativity Theory

### Change in Mass relate to speed travels

Speed of light is alsway constant , v = C . When matter moves at speed of light, matter no longer has mass . Observed fron Plank in experiment with Black Body Radiation

${\displaystyle m=0}$  when ${\displaystyle v=C}$

All matter moves at speed less than speed of light has a mass of mo

${\displaystyle m=m_{o}}$  when ${\displaystyle v

Therefore for any matter moving at speed less than speed of light but not equal to the speed of light

${\displaystyle m=m_{o}(1+{\frac {v}{C}})}$

### Wave length of a Momentum

Any momentum travels at speed of light C carries quantum energy ${\displaystyle E=h{\frac {C}{\lambda }}}$  will have a wavelength

${\displaystyle \lambda ={\frac {h}{p}}={\frac {h}{C}}{\frac {1}{m}}}$

Which can be easily proved

${\displaystyle pC=h{\frac {C}{\lambda }}}$
${\displaystyle \lambda ={\frac {h}{p}}={\frac {h}{C}}{\frac {1}{m}}}$