Beams Definition and 259 Threads

If i have a simply supported J Section beam, when I'm calculating the max deflection, what value of I do i use? I have already had to calculate Ix, Iy and Ixy. I would imagine that as deflection occurs along the y-axis that i would use Iy. Or do i use Imin? I have already calculated...

Suppose I have an arbitrary amount of diode lasers, all of identical construction and abilities. Assume I can determine/control the polarization of each diode beam. Does anyone know how I can increase the amount of photons in a single laser stream via combining all the diode beams without...

Beams of light and wave effects... Let us first think of a ripple tank and how this is used to demonstrate diffraction nad interference- this is one wave front so when passes through small gap curves the wavefront, spreads the wave out and thus causes diffraction. We often use this analogy to...

THEORY OF THE IONIZATION OF GASES BY LASER BEAMS could anyone help me about is theory ican't find it plase iknow i ask a lot :blushing: but sometime my mad don't work enough :confused:

I have a few questions about matter beams. 1. Is a matter beam simply a stream of particles? Can I make an alpha, electron or neutron beam by simply encasing a radioactive source in lead, punch out a hole and filtering out the rest? Can air rushing out of a tire in a vacuum chamber be...

Two identical uniform beams, each having a mass of 4 kg, are symmetrically set up against each other on a floor with which they have a coefficient of static friction µ = 0.609 . a) What is the minimum angle the beams can make with the floor without falling? b) For the angle calculated in...

Look at this picture http://myfiles.dyndns.org/pictures/stress.jpg The top and bottom bars do not bend at all. The setup is taken outside where the temperature is 70C colder then a force of 100kN is applied to the top. Find the stress in each of the 3 columns. The area of each aluminum...

what happens when two beams of light pass through each other perpendicular to each other??

I wasn't sure whether to post this in the classical or relativity section. While pondering something I found an embarrassing gap in my knowledge. I can't quite get my head around this problem and I need a fresh perspective. Consider two beams of electrons moving parallel to each other. The...