Recent content by fedecolo

Thanks. But how can I set the equation for the constructive interference in the first case? There is no interference since the light is transmitted(?)

Homework Statement Between two pieces of glass (##n_1=1.70##), there is a thin film of water (##n_2=1.33## and width ##d=1 \mu m##). If there is normal-incidence of white light on the water surface, find: (a) which wavelenghts can be seen in the light transmitted (answer: 667 nm,533 nm,444 nm...

I thought the same thing, but without the lens I would have a width of ##\Delta y_{interference}=1,3 cm## and with the lens the answer should be ##\Delta y_{interference}=\Delta y_{diffraction}=1,95 mm##. By seeing the picture, I think that the rays focus on the same points (of the case without...

We are in the latter case. And no, the difference of path remains the same before the rays impinge on the lens and after they exit. But this fact doesn't give me no information about the position of the maximums/minimums of interference.

Homework Statement Two slits (of width ##a=39 \mu m##) are lighted up with a monocromatic wave of ##\lambda=632,8 nm##. The distance between slits and the screen id ##D=4 m##. The distance between the slits id ##d=195 \mu m##. In front of the slits there are a convergent lens with focal length...

But the pulley is accelerating, because the block 1 must move downward!

Yes, it's statics problem. The other question asks what are the accelerations of the blocks if the condition is satisfied. The pulley can rotate without friction around its axis, but there is friction between the wire and the pulley, so the 2 tensions are different.

Homework Statement In the figure there are a block 1 of mass ##M##, a pulley (disk) of mass ##M## and radius ##R## and a second block of mass ##2M## on an inclined plane with an angle ##\alpha## with respect to the horizontal. On this plane the static friction is ##\mu##. The wire does NOT slip...

Thank you very much, I'm going to read this book immediately!

Homework Statement A particle of mass ##M## and speed ##v_1## bumps a particle of mass ##m##, ##(M >m)##, at rest. Find the maximum angle of deflection of ##M## after the bump.The Attempt at a Solution I would like to solve this problem in the reference frame of the center of mass, because it...

Well, my question come from a ordinary life problem. When I am on the train, and it starts going foward, I feel pushed backward because I tend to maintain my state of quiet (let's call state ##A##). But after some while I don't feel a force pushing me because I am now in a state of steady speed...

The first law is the principle of inertia :|

Is there a mathematic model for the first law of dynamics? If no, do you think that this law can be modellized with maths?

In cylindrical coordinates the axe ##z=\hat{z}##, but I must direct the ##\hat{z}## in the direction of the axe of rotation (inclined by an angle ##\alpha##)?

z is oriented as the axe of rotation of the cylinder if ##\alpha=0## y is oriented towards the axe of rotation (still if ##\alpha=0##) x by consequence