rktpro

No, I don't, as I have four college semesters of Spanish behind me.

That doesn't mean a negative point buddy.

I didn't know about your degree. What I was pointing out there was to use google translator as a tool for translator, of course only when you don't know that!

I am getting interested in relativity. I would read some when I get time!

I tried to prove that distance of image is same as the distance of object in a plane mirror.

The image attached is the ray diagram.

First of all, I have assumed object and image to be parallel to mirror.

First I proved angle TSA = angle TSa

Then I have made similar triangle TSA and triangle TSa with AA similarity. ( where angle ATS = angle aTS ----each 90)

Therefore, TS/TS = TA/Ta

=> TA=Ta ( TS/TS = 1 )

=> AS=aS

( corresponding parts of similar triangle are equal in ratio)

Using this, I have made triangle ABS and abs congruent.

where,

As=aS

angle ASB = angle aSB

angle ABS = angle aBS

=> AB=aB ( corresponding parts of congruent triangles are equal)

Therefor, size of image is same as that of object.

Also, Bs=bS

(corresponding parts of congruent triangles)

That is, distance of image from mirror is same as that of object from mirror.

Now, I want to know how to prove that angle of image is same as that of object with principal axis? Because in my above method I already assumed both to be 90 degree. In other words, how to prove that image is erect too?

Aww, but please.

Why you gotta spoil the fun?

You must be the relativity guy.

Let's see what you people say about it.

Attention posters:

 

If you plan on speaking a foreign language in a thread in an academic manner, you need to provide a translation.

You need to know about google translator.

What a loss. He was such a genius, a great man!

CaptainPanic ,

 

there is nothing more to say .

 

 

Now Panic you.

The speed of light changes, but the speed of a photon does not.

How, sir?

Before some special relativity guys ruin this simple question: YES! You are correct. Classically speaking, your understanding that the speed of the object's reflected image relative to the object could be approximated as 2v (with less accuracy as the object's speed approaches c) is perfectly sound. Though I already qualified the hell out of that last sentence, I should also include that this only counts for movements directly toward or away from the reflection, lateral movement, obviously, would not stack.

Book of such good author and still mistakes. Thanks buddy.

If everyone went bankrupt there would be utter chaos and annoyingfights. Just imagine everyone suddenly turning into beggars. =shakes head=

 

Not beggars. From whom would they beg? Nobody because everyone is bankrupt.

How then to explain that a ray of light passes through the clear water without dispersion? Absorption and emission of photons by molecules should be visible in the form of diffuse light, or maybe as the rainbow?

Because the time taken for absorption and emission in less than 10^-3 seconds.

A good alternative is to have your kids read. Then after work when you get home you can actually play games with them. Bond more with them and become best of friends.

Kids don't prefer reading these days. What majority would love reading would be comics or novels and they can be full of violence some times.

I came across this while reading--If an object approaches/moves away from a mirror with velocity v then the image approaches/moves away from the mirror with velocity 2v. Isn't this wrong? The image should approach/move away from object with 2v rather than from mirror.

Thanks.

Obtener un primer libro que probablemente se lee "Aprende Inglés en un mes".

Luego, puedes comenzar la conferencia.

The answer is that light does not really travel slower in water. What happens is that the light travels at c from water molecule to water molecule. When it interacts with a molecule, the molecule absorbs it and is excited to a higher energy level. After a short delay the molecule sheds that excess energy by emitting a photon ( no tthe same photon it absorbed, that photon was destroyed when absorbed, which heads off at c until it encounters a molecule. It is the accumulation of all these delays that makes it appear as if the speed o flight has been lowered.

Appear? Or actually?

Suppose that somewhere in the universe is the civilization that exist exclusively in the underwater world, in which the speed of light is 230 km/s. The question concerns whether their imaginary underwater rockets can therefore overtake the light in their world?

 

They might. What they can't is overtaking speed of light in vacuum( unless they have heard of neutrinos defying barrier or something.)

Hmm, I apparently missed a point there. Thanks for pointing Captain. I agree BMI is not for those who are still in growing age.

Dr. Rocket. Is there any relation between gravitational field and electromagnetic field? Like, If I throw a magnet through a circular loop what would be the acceleration of magnet? Equal to g or less than it?

The energy transferred in an electric comes from the electromagnetic field, not the kinetic energy of the electrons.

 

Electromagnet field or electric field?

This seems like a pretty straightforward Faraday's law type of problem. emf= opposite of the time derivative of the magnetic flux times the number of coils. I believe you will need to know the speed at which you are moving the magnet as well as the resistance of the galvanometer to complete the problem.

Can you show how it's done? I am a beginner at this

I didn't pass out and I drank that much on my own accord I realize now it was pretty stupid.

And now you won't quit. Won't you?

One fact must be remembered that lenders survive when borrowers dwell. Economic development needs the growth of lenders, no doubt, but it leads to increase in number of borrowers. Lenders can increase when they have borrowers.

Besides, economic crisis is really broad and not limited to lenders or borrowers.

I need help. How can I build an airplane out of paper, cardboard, or construction paper, that is capable of carrying an egg 20 feet at least and land safely without the egg breaking or falling off when we throw them off a 2nd story balcony?

Make a large plane (not the size they actually are) which can be thrown out of window.

What you have to prevent from breaking plane of egg?

Just boil the egg.

I'm 16 about 5"10 and I weigh 8.5 stone (last time I checked I think I'm more thank that now).

 

I had 3 bottles of bulmers cider and 4 rum shots and I was totally out of it. Does this make me a lightweight or is that normal??

Check BMI

MS Security Essentials is the best