Recent content by IDOGAWACONAN

Well infact these phenomenons have been well investigated... they can be explained by science,nothing strange.

The first one is used when the light is natural light; And use the second when it is linearly polarized light.

...Sorry I post it on page 1 but it is now on page 2...I don't know why... It seems all questions are solved :-)

Hi Eθ is also 0 Beside Gauss's law there is also a circuital theorem says that the integral of E*dl at a closed circuit is 0(just electrostatic field).

There aren't only 2 equations: 1.Energy Final = 1/2 M(velocity of wedge)^2 + 1/2m(velocity in horizontal direction of little block)^2 + 1/2 m(velocity in vertical direction of little block)^2+mg* h 2.velocity in horizontal direction of little block *m=-velocity of wedge*M 3.tan(angle of...

And of course if you just want to know the relationship between velocity with h but not with t,you don't have to replace it with dh/dt to make a differential equation,it's easier to solve.

I come up with a kind of method... I don't know if it work First your equations are wrong ,the right one should be: Energy Final = 1/2 M(velocity of wedge)^2 + 1/2m(velocity in horizontal direction of little block)^2 + 1/2 m(velocity in vertical direction of little block)^2+mg* h...the h...

Homework Statement When books of elctromagnetism talk about Electrostatic equilibrium，they say electric charges will keep moving if electric field in the conductor doesn't equal to zero utill it does.However,what if there are no excess free charges in the area where that doesn't equal to...

But the mass of the star will grow.When it's beyond the Chandrasekhar'limit,should it become a black hole?

Homework Statement If I fly at the speed which is similar to the speed of light,and I am watching a still star,then because of the theory of relativity,the size of the star will change.If the size of the star turn to the size of a neutron star or a black hole,what will happen?Will I see a...