III. The experiment of deviation of the light by the sun (1919 Eclipse).--[ Return home ]

I. Simplified calculation.

According to the speed of light: , we have: . Thus according to the motion equation for light:, where Vx must be replaced by Vy (see figure below) we have :

We have also: . As Y= Yo doesn't change a lot, we have:

If we chose Gamma =0 for x=0, we have:.

That is to say: Deviation= 1.74 '' of arc.

This result is in good agreement with the result obtained in 1919 at Sobral, but a better rigorous calculation yields: 1.6 '' of arc in agreement with the result of the island of Principe.

II. Better calculation.

Soon available.

[ Return home ]