Recent content by bcca

I'm not sure how to account for the 180 phase shift. What is a phase difference? Both of these concepts come in later sections of this chapter that are supposedly not needed for the problem. But am I even viewing this right? I don't see h as the path difference.

No wonder you can't understand it! I drew r1 and r2 in the wrong place, sorry. From the diagram, r1/r2=sin(b). I'll redraw it. Drawing the pathlength difference might clutter the diagram. If you can't tell where it is once I fix the drawing let me know. I found that the answer comes out if...

Sorry, I mentioned theta was "a", 25 degrees. There was no theta in the editor I used. The section associated with the problem doesn't mention refractive index, so I suppose we assume there is no phase change. Is your equation supposed to be multiplied by wavelength? The difference should be in...

Homework Statement My solution isn't working out for this question. Radio waves of wavelength 125 m from a galaxy reach a radio telescope by two separate paths. One is a direct path to the receiver, which is situated on the edge of a tall cliff by the ocean, and the second is by...

I got it! Thanks :)

I think I'm not understanding something about this problem. Can someone help me out? Homework Statement A 2.0 kg disk traveling a 3.0 m/s strikes a 1.0 kg stick of length 4.0 m that is lying flat on nearly frictionless ice. The disk strikes the endpoint of the stick, at a distance r = 2.0 m...

Oh, thank you so much! That was a very persistent calculation error :). I kept subtracting them on accident.

Hello. Can someone help me with this problem please? An inclined plane of angle theta = 20.0 has a spring of force constant k=500 N/M fastened securely at the bottom so that the spring is parallel to the surface as shown in figure P7.63. A block of mass m = 2.50 kg is placed on the plane at a...