Wave Frequency Change Caused by Gravity and A New Redshift

Measure the frequency of the same electromagnetic wave from different directions may find out the differences of these frequencies.So find out the rule of the effect by the Earth’s gravity.Then dicuss the common feature of the universe’s three redshifts (gravitational redshift,doppler redshift, cosmic space expansion redshift)and the conflict with the real star redshift.Give a new theory of redshift(Spread Redshift). It can explain existing cosmic observation and does not need the theory of the Big Bang