Recent content by sawer

I think, "pushing upwards by the ground" is not pushing or cause by any force. Am I right? This pushing effect must be result of curvature. Right?

OK. Thank you. How can this analogy(walking due north) be adapted to a man standing on the ground and felt a force??

Thanks for answer. There is just one thing that I can not imagine is as you said it is geodesic, but I imagine even it is geodesic, it is line, why does it have to be just one way on the geodesic, even my free falling stopped? I was in the space something pushed me, I felt and I hit the ground...

OK. Gravity is not a force it is a contraction or curvature of space. I was free-falling and now I hit the ground. Why don't I float through the universe, or go upward instead of still trying to go downward. Because I hit the ground, and now there is no force(like gravity) and my free-falling...

Hi 1-)If an object's total velocity through space-time(four-velocity)is c, for example even we stand still we move with velocity c (through time) and if mass slows down time, can we say mass also increase our velocity in space? 2-) Is Four-velocity magnitude constant in General Relativity...

Thank you Orodruin and Ibix I got it. If gravitational field strength relates to mass and mass is a parameter of Schwarzschild factor, then why do say "it does not directly relate to gravitational field strength"? Mass itself, also slows time. The bigger the mass means more time dilation...

Hi I have 2 questions. There are 2 planets and one clock on each of them. One of them has a bigger gravitational field strength. And two clock have same distance from the core. 1-) Does time dilation occur between two? Which clock ticks slower? 2-) If time dilation occurs, which formula...

If there is a conducting loop, doesn't a current appear? This equation indicates that the temporally changing magnetic field does yield a "spatially" changing electric field. Right? I am asking if this spatially changing electric field is also temporally changing, then can we write left side of...

According to Faraday's Law, Time-Changing magnetic field creates an induced current in a closed conducting loop. This is the equation: ##\nabla \times \mathbf{E} = -\frac{\partial \mathbf{B}} {\partial t}## 1-) Does this current (##\nabla \times \mathbf{E} ##) have to be an alternate...

I read that: "Length contraction is caused because moving objects bend space. And that is the difference between Lorentz's and Einstein's length contraction concepts. Lorentz thought length contraction really occurs but Einstein thought that length contraction is a consequence of bending space...

Hmmm... 1-) But there is always a chance to find it on another pixel right? 2-) In double slit experiment, we can observe electrons can diffract and we can't be sure where to to find it on screen. This is also true for without double slit case right? I mean if we fire an electron and even...

How do CRTs work well and electrons can be sent to exact location on screen in CRT monitors if electrons can behave like wave? Is there something in old TVs (for example measurement device) along the road that electron travels to avoid behave like wave?

In my electromagnetic theory book, there is a classification of vector fields, one of the 4 different type vector fields is "solenoidal and irrotational vector field" (both divergence-free and curl-free). If solenoidal and rotational vector fields are same thing, then it means the vector field...

There are 2 types of magnetic potential energy equations: 1. ##U = -\vec \mu \cdot \vec B## 2. ##U = \frac{1}{2} \int \mathbf{A} \cdot \mathbf{J} \, \mathrm{d}V## - I have searched for the second equation, only can find some information in one web site. Do you know what their names are and...

And Gravitational Force always points inwards. So for gravitational force, the result of dot multiplication is always negative. Then what is the point of dot multiplication. How can we determine gravitational force make positive or negative work? Thanks for help...