Recent content by bksree

Hi In the book, "Why does E= mc2" by Cox and Forshaw, while discussing time dilation, the example of a muon is given. The authors explain that muons when circulated in the 14 m diameter AGS facility at Brookhaven at 99.94% of the speed of light, its lifetime is increased from the value of 2.2...

Hi Which of these understandings is correct ? A stationary particle separates into 2 particles A & B Is it that : (a) One can independently measure accurately to the desired accuracy the momentum of A and the position of B and thus obtain both position AND momentum of either particle thus...

Hi Thanks for your response. I want to derive the relation to show the side band frequencies just like that obtained for the beat frequencies. And I want to do that using the simple trig relations you've shown. I went through some oder posts and saw this...

Hi If 2 signals of frequencies y1 = A cos ##\omega_1## t and y2 = A cos ##\omega_2## t are combined the resultant signal is given by y = y1 + y2 y = 2A cos (w1-w2)t/2 cos (w1+w2)t/2 If w1~w2 then one can plot the beat phenomenon from this equation. But if w1 >> w2 as in the...

Only if you are at the centre. Otherwise the mass of the shell closest will increase larger force than that away from you, isn't it?

Continuing the solution : Suppose it is given that ## V(x) = \frac {\partial y} {\partial t}_{t=0}## Then differentiating ##y(x,t) = f(\eta) + g(\xi)## = f(x+vt) + g(x-vt) w.r.t time 't' ##\frac {\partial y(x,t)} {\partial x}_{t=0} = \frac {\partial f} {\partial \eta} \frac {\partial \eta}...

Thank you

In D Alembert's soln to wave equation two new variables are defined ##\xi## = x - vt ##\eta## = x + vt x is therefore a function of ##\xi## , ##\eta## , v and t. For fixed phase speed, v and given instant of time, x is a function of ##\xi## and ##\eta##. Therefore partial derivative of x w.r.t...

Thank you

Summary: Unable to view equations in proper format Hi I am unable to view equations in proper format even after using latex tags shown in help. For example : \xi = x - vt is shown as typed Again \frac {\partial x} {\partial y} = is shown as typed Please help TIA

Thanks again for your time. Is this what you mean ? ∂ f/∂ ξ = ∂ f/∂ (x+vt) = ∂f /∂ x at t = 0 TIA

Hi Thank you. My doubt is : How is it concluded that (all partial derivatives) df/dξ = df/dx and df/dη = dg/dx TIA

Hi On page 81 of the book "A student's guide to waves by Fleisch and Kinneman a conclusion is made while differentiating D Alembert's solution to the wave equation. Will someone explain this please ? The details are in the attachment TIA

This is a worked out problem in the book 'Spacetime Physics'. The answer obtained by working it out using the alternate method is different. Will someone explain which is correct ? Thank you in advance. Problem : A command centre gets message that a meteor has just passed one of its outposts...

Hi There is a story that Enrico Fermi calculated the intensity of the first nuclear test at Los Alamos from the distance moved by scraps of paper. Are there documented details of the calculation in any paper / book ? TIA