Proof of the derivative of delta function

AI Thread Summary
The discussion focuses on proving the relationship δ'(ax) = (1/a)*(1/a)*δ'(x), where 'a' is a constant. The original poster struggled with applying the scaling theorem and the formal definition of δ'(x) to derive the second (1/a) term. They sought insights from others to resolve the issue. Ultimately, the poster found a solution independently and indicated that further replies were unnecessary. The thread highlights the complexities involved in manipulating the properties of the delta function and its derivatives.
rocky3321
Messages
4
Reaction score
0
The problem is to prove that δ'(ax) = (1/a)*(1/a)*δ'(x), where a is a constant. I tried applying the scaling theorem with the formal definition of δ'(x) but I can not get the second (1/a) term. Does anyone have some insight on this problem? Thank you...
 
Physics news on Phys.org
I was able to figure it out, so you do not have to reply to this thread.
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top