. A beam of white light goes from air into water at an incident angle of 75.0°. At what angles are the red (660 nm) and violet (410 nm) parts of the light refracted? Are the angles going to be different if the light strikes a crown glass slab, instead of water? Explain.

1. Imagine a triple-slit "grating", where the distance to the screen is much larger than the distance between the slits. By using phasors, show that the intensity of the interference pattern is given by I = I(1 + 4 cos & + 4 cos² ø). (Hint: Recall the intensity of fringe pattern in Young's two-slit interference experiment.)

A photon moving in the +x-direction, scatters off a free stationary electron. The wavelength of the incident photon is 0.0310 nm. After the collision, the electron moves at an angle a below the +x- axis, while the photon moves at an angle = 81.3° above the +x-axis. (For the purpose of this exercise, assume that the electron is traveling slow enough that the non-relativistic relationship between momentum and velocity can be used.) (a) What is the angle a (in degrees)? 47.21 X What is the shift in wavelength of the photon due to the scattering? How can you use momentum conservation in the horizontal and vertical directions to determine the angle? counterclockwise from the +x-axis (b) Determine the speed of the electron (h m/s). m/s

What is the separation between two slits for which 580 nm light has its first minimum at an angle of 28.4°?

= The figure shows a horizontal beam of mass M = 59.1 kg and length L = 6.4 m supported at its left end by a frictionless pin and at the other end by an ideal cable attached to wall h 4 m above the beam. A mass m = 22.1 kg is suspended from the beam a distance d = 2 m from the wall. Find the tension in the cable. T h d→ m M L = _ N Report your numerical answer below, assuming three significant figures. Remember to include a as necessary.

3 Charged Closed Wire Consider a thin closed wire with the radius R localized at the origin on the xy-plane, which is charged uniformly with the total charge Q. (i) What is the charge density p in this problem? (ii) Calculate the electric field along the z axis? (Hint: First, consider an infinitessimal piece of the charge.)

In a maximal flow problem, a.the flow out of a node is less than the flow into the node. b.the number of arcs entering a node is equal to the number of arcs exiting the node. c.the objective is to determine the maximum amount of flow that can enter and exit a network system in a given period of time. d.None of these choices is correct.

What does the Ricardo-Barro effect say about the crowding-out effect? A. There is no crowding-out effect. B. The crowding-out effect will be large. C. The crowding-out effect will be small. D. It will be a crowding-in effect. Thanks!!!

What is the conversion cycle of petron?

Resolving power is the O ability to tell two points apart as separate points. O ability to make an object larger. O focusing mechanism used to bring objects clearly into view. O depth of the specimen clearly in focus. O optimum power used to most clearly view the entire specimen.