Recent content by sty2004

Anyone familiar with optical engineering can help me?

Can anyone provide me some sort of alien technology?

@jbriggs444 Thanks @M Quack I am afriad that VUV or X-rays have been considered by my team. Anyway, thanks for your reply.

hi jbriggs444 The black carbons are inclusions that naturally exist in diamond. http://www.allaboutgemstones.com/diamond_inclusions_carbon.html From the photo, there are black inclusions that due to total internal reflection..

Please give me some ideas~~

I have difficulties in finding the true black carbons in a diamond from an image. Since diamond has a high refractive index of 2.42, it has a critical angle of 24 degrees such that total internal reflection can easily occur (total internal reflection causes fire in diamond) . Now I have...

how to find wave after measurement then?

Homework Statement Consider a harmonic oscillator. It is in the ground state. Momentum is measured and is found to be between 0.2 \sqrt{}m\omega hand 1.5 \sqrt{}m\omega h. (h here is h bar) Energy is now immediately measured. What is the probability that the energy is unchanged? You may...

attempt:\Phi(x,0)=\sumcn\phin and cn=<\phi|\Phi> and then P=|c1|2=|<\phi|\Phi(x,0)>|2 ? what should be \phi ?

Homework Statement A mass m is connected to a spring of spring constant k. The equilibrium position is x = 0 and the motion of the mass m is restricted by a stop such that spring compression is not allowed, i.e., x < 0 is forbidden . The system is in the ground state. (a) The stop is...

Homework Statement The van der Waals’ equation of state for one mole of gas is given by (P+a/V2)(V-b)=RT where V is the molar volume at temperature T, and a and b are constants. The internal energy of the gas is given by E=(3/2)RT-a/V Initially, one mole of the gas is at a temperature T1...

Hi i am doing self-study of number theory as it looks interesting and enlightening. Can someone help because I encounter a problem here.. Suppose A = {a1,a1,,,,,,,ak} is a complete residue system modulo k. Prove that for each integer n and each nonnegative integer s there exists a congruence...

Homework Statement Prove that a5 \equiva (mod 15) for every integer a. Homework Equations The Attempt at a Solution I do not know how to show a5-a is divisible by 15

base representation please help~ It is known that if asks+as-1ks-1+...+a0 is a representation of n to the base k, then 0<n<=ks+1-1. Now suppose n=asks+as-1ks-1+...+a0 and m=btkt+bt-1kt-1+...+b0 with as,bt not equal to 0, are two different representations of n and m to base k, respectively...

base representation please help~ It is known that if asks+as-1ks-1+...+a0 is a representation of n to the base k, then 0<n<=ks+1-1. Now suppose n=asks+as-1ks-1+...+a0 and m=btkt+bt-1kt-1+...+b0 with as,bt not equal to 0, are two different representations of n and m to base k, respectively...