Is it true that during eclipse the gravity of Earth becomes less ? :

during eclipse the gravity of Earth becomes less

 Yes, it is absolutely true that the force of gravity decreases during eclipse. As the force of gravity decreases, the sea water swells more during lunar eclipses and solar eclipses and this is why in some patients the disease increases at that time. It is clear that the gravitational force decreases as a result of the eclipse but what could be the exact cause ? 

Reasons for reduction of gravitational force due to eclipse :   

   Since the earth, moon and sun are in a straight line at the time of eclipse, the combined gravity of the moon and sun reduces the gravitational force of the earth slightly. We know that Earth's gravitational acceleration is often 985 cm/s².

  The gravitational acceleration of the earth is reduced as a result of the attraction  the moon

985 × M/( E+M) × R/Rem 

 =985×(4×10²⁵)/(6×10²⁷)×{(6.371×10⁸)÷(3.844×10¹⁰)}²

1.804 ÷ 10³ cm/s²  and the gravitational acceleration of the earth is reduced as a result of the attraction  the sun 

 g × S/(S+E) × R/Res

  = 985 × 1 × {(6.371×10⁸)÷(1.49598 × 10¹³)}² 

 = 1.787 ÷ 10⁶ cm/s ²

  Due to this the attraction of the moon on the earth is seen more than the sun and the time of eclipse increases more.