# 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

$m=0$  when $v=C$

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

$m=m_{o}$  when $v

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

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

### Wave length of a Momentum

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

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

Which can be easily proved

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