Explore BrainMass

Explore BrainMass

    Light Reflection

    Reflection is the change of direction of a wave front between two different materials such that the wave front returns into the material from which it started from. The law of reflection states that for a specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected. Mirrors are an example of specular reflection. Reflection of light can be mirror like or diffused depending on the nature of the material interface. 

    The laws of reflection are as followed:

    1. The incident ray, the reflected ray and the normal to the reflection surface at the point of the incidence lie in the same plane
    2. The angle which the incident ray makes with the normal is equal to the angle which the reflected ray makes to the same normal
    3. The reflected ray and the incident ray are on the opposite sides of the normal

    The reflection equation which these three laws are derived from is:

    X – 2(v,x)v = x – 2v(vHx)

    © BrainMass Inc. brainmass.com April 26, 2024, 3:32 am ad1c9bdddf

    BrainMass Categories within Light Reflection

    Mirrors

    Solutions: 62

    A mirror is an object that reflects light in a way that preserves the original image.

    Absorption

    Solutions: 8

    Absorption is the way in which energy of a photon is taken up by matter.

    Fiber Optics

    Solutions: 4

    Fiber Optics are thin transparent fibers which reflect light.

    BrainMass Solutions Available for Instant Download

    Question Bank - Bravais Lattice, Miller indices, Bragg's Law

    See the attached file. 1. We know that face centered lattice in cubic and orthorhombic (FCC & FCO) system are listed in Bravais lattice system but face centered tetragonal (FCT) is not listed, why? 2. Draw the plane with miller indices (122) in the unit cell of cubic lattice having lattice parameter 'a'. Find its distances f

    Bragg reflection

    (a) State Bragg's law and identify all parameters involved. (b) Make a sketch with two layers of atoms and show all parameters. (c) For a wavelength of 0.330 nm and first order and a lattice spacing of 0.215 nm, what angle will give you a diffraction maximum? (d) Describe an application of bragg diffraction.

    Ultrasonic Wave Reflection

    Ultrasonic wave reflection A narrow beam of ultrasonic waves reflects off the liver tumor in the figure below. If the speed of the wave is 11.3% less in the liver than in the surrounding medium, determine the depth of the tumor. Assume theta = 50.8° and L = 15.0 cm. Please solve and explain

    The Bragg Condition for Constructive Interference

    The Bragg angle for a certain reflection from a powder specimen of copper is 47.75º at a temperature of 293 K and 46.60º at 1273 K. Find the coefficient of linear thermal expansion of copper. The Bragg condition is n*lambda = 2*d*sin(theta)

    Quantum Mechanics and Particle Incident

    Part 1 A particle incident on the potential step with a certain energy E < U is described by the wave ψ(x) = (1/ 2)* {(1 + i)e^ikx + (1 − i)e^ikx }, x ≤ 0 ψ(x) = e ^−kx , x ≥ 0 Evaluate the penetration depth δ = 1/k for 9.4 MeV protons incident on this 23.4 MeV step. Answer in units of fm. Part 2 A pa

    single slit diffraction of sound wave

    Hint: The angle may be too large to use small angle approximation. Sound waves of frequency 567 Hz enter a window 1.1 m wide. The window is in the exact center of one wall of a theater 24 m by 12 m. The window is 12 m from the opposite wall, along which is a row of seats occupied by people. The theater is acoustically prepar

    Waves

    When a helicopter is hovering 1450 m directly overhead, an observer on the ground measures a sound intensity I. Assume that sound is radiated uniformly from the helicopter and that ground reflections are negligible. How far must the helicopter fly in a straight line parallel to the ground before the observer measures a sound in

    Determining the Speed or Distance of a Wave

    1. Josh and Pete are resting on top of the water near the end of the pool when Josh creates a surface wave. The wave travels the length of the pool and back in 25 seconds. The pool is 25 meters long. Determine the speed of the wave. 2. While hiking through a canyon, Jack lets out a scream. An echo (reflection of the scream of

    Average Power Delivered to Load Resistors

    A 50 ohm lossless line is terminated with 60 30 ohm resistors in parallel. The voltage at the input to the line is V(t) = 100cos(5 x 10^9t) and the line three-eighths of a wavelength long. What average power is delivered to each load resistor. (see attachment for full formatting)

    Transmission Line and Inductance

    A lossless transmission line having Z0 = 120 ohms is operating at w = 5x10^8 rad/s. If the velocity on the line is 2.4 x 10^8 m/s, find: a) L b) C. c) Let Zl be represented by an inductance of 0.6 uH in series with a 100 ohms resistance. Find T and S. (See attached file for full problem description and better formula repre

    Packing, Calculation of Density

    Physics, Solid State Physics Year 4 Packing, calculation of density, etc, -------------------------------------------------------------------------------- I do not know how to show this problem exclusively to you but I just put your name on tope instead. Please write very clearly so that I can read the material well. Pl

    A Standing wave is the sum of two given waves on a wire. Write its equation.

    See attached file for the graph. A certain wave and its reflection simultaneously travel along a wire. The two waves are: y1= .15 sin (5x - 3 Pi t) and y2= .15 sin (5x + 3 Pi t). When they combine, they form a standing wave. PART a. Write the equation of the standing wave produced on the wire. PART b. Calculate the dis