Science PeTa

4. - It is the displacement of the spectrum of an astronomical object toward longer wavelengths which is red.
7. - planet which is said to be most affected by the gravitational force of the sun
9. - The change in velocity of moving object
10. - He developed the special theory of relativity
12. - An observer perceives length differently while moving at constant speed due to the length ___________
14. - According to the Theory of Relativity, this is the point when an object that becomes black hole must collapse.
15. - A part of wave which is described as the distance between two adjacent points.
17. - Visible lights move in a manner like _______________ in the water.
19. - No two events happen at the same time for two observers is the principle of___________
20. - According to General Theory of Relativity, It causes curve in space

1. - This is a disturbance in the regular elliptical movement pattern of a certain celestial body.
2. - This is a force that pulls the objects with mass together
3. - He demonstrated that electric and magnetic fields travel through spaces as waves moving at the speed of light
5. - Time _______ is the difference in time experience by an observer moving at a constant speed.
6. - Speed of moving object with direction.
8. - The fastest speed known to man is equal to the speed of ______
11. - ________ is a special type of reference where an observer does not accelerate
13. - In a Newtonian physics, all speeds are _______________.
16. - _______ is equal to the mass multiplied by the square of the speed of light
18. - . A three-dimensional extent in which objects and events have relative position and direction.