Homework Statement
Two diffraction gratings are stuck together, both with vertically aligned slits. Grating A has S1 slits and B has S2 slits.
What is the new equivalent grating that is the product of two of the diffraction gratings above?
(s1>s2>>>1)
Homework Equations
a. N* = 1/d...
Homework Statement
A man who is farsighted and standing in front of a flat mirror without glasses at some distance to see his image in focus. When he puts on his glasses he comes closer for seeing himself in focus to a distance that is 6 times shorter of the previous distance.
a. what is the...
Homework Statement
A man is both farsighted and shortsighted so his natural correct view is between 70cm to 100cm.
What will be his view range if he puts on his reading glasses?
Homework Equations
\frac{1}{u}+\frac{1}{v} = \frac{1}{f} = D
The Attempt at a Solution
I calculated...
A shot:
G = - \frac{\partial U}{\partial\theta}
= - \frac{\partial(-p \cdot E)}{\partial\theta}
= \frac{\partial(pEcos\theta)}{\partial\theta}
= - pEsin\theta
= - p \times E
did I get it all-right?
Homework Statement
In a plastic film factory, a wide belt of
thin plastic material is traveling between two successive
rollers with the speed v. In the manufacturing process, the
film has accumulated a uniform surface electric charge
density σ. What is B near the surface of the belt in...
Homework Statement
Derive equation of torque: G = p X E from equation U = -p\cdotE
Homework Equations
G = \int x \times \rho(x)E dV
U = \int \rho(x)x \cdot \nabla\varphi dV
The Attempt at a Solution
I tried to figure how to represent G in a way that better express the nature...
Homework Statement
Express the intensity from a beam that crosses a Michelson Interferometer that its beam splitter transfers 1/3 and reflects 2/3.
Homework Equations
N/A
The Attempt at a Solution
Would like to have a hint...
Homework Statement
A system consisting of 5-slit (completely identical) that the distance between their centres, d, is four times the width of a slit, b.
Calculate the relation between the major maximum at the center and the next maximum (can be given that position of the maximum is...
Homework Statement
At a young's experiment arrangement, there is a 500nm light beam, a distance of 1m from the slits to the screen and a 0.25mm between the two slits
In what way the interference pattern will change if an adhesive tape is being taped to one of the slits with a 1mm thickness and...
Homework Statement
A body is positioned 40 cm from the left of a lens (f=30) and the lens is positioned 100cm left of a convex mirror (|R|=60), where will be the image and what type and magnitude will it have?
Homework Equations
1/u + 1/v = 1/f
The Attempt at a Solution
I tried to...
I understood my mistakes:
a. the correct equation to use is the simpler lens equation (although we can use the above one, but no need)
b. on the second iteration we need to take the new u from the old v but to do the conversion 100-u=u(new) because the new reference image is between the two...