7. The incident radiation intensity entering the material that is used to make a pair of safety glasses is 10^7 W/cm^2 and the intensity of the radiation measured after transmission is 1W/cm^2. What is the optical density OD of the safety glasses.
a) Log10 (6)
b) 6
c) Log10 (7)
d) 7
e) none
7. The incident radiation intensity entering the material that is used to make a pair of...
Question 6 (1 point) Five groups of three different lasers are listed below. Which group is listing three lasers emitting in the visible spectrum? Nd:Yag, ArF, excimer laser Ruby, Nd:Yag, He:Ne Argon, Ruby, KrF Alexandrite, Er:Yag, CO2 Ruby, Argon, He:Ne Question 7 (2 points) The incident radiation intensity entering the material that is used to make a pair of safety glasses is 107 W/cm2 and the intensity of the radiation measured after transmission is 1W/cm2. What is the optical density...
On a clear day, the total intensity of solar radiation incident at the Earth's surface is approximately 1000W/m2 Part a Assume our atmosphere absorbs 23% of the incoming solar radiation, and that the distance from the Earth to the Sun is 1.5 x 1011m. From this information, what do you expect is the total power output of the sun? [IMPORTANT: to express a number like 2 x 1021, type 2e21] Enter answer here O of 4 attempts used CHECK ANSWER...
Cesium metal is to be used as the photocathode material in a photoemissive electron tube because electrons are relatively easily removed from a cesium surface. The work function of a clean cesium surface is 1.9 eV. What is the longest wavelength of radiation which can result in photoemission? a. b. If blue radiation of wavelength 450 nm is incident onto the Cs photocathode, what will be the kinetic energy of the photoemitted electrons in eV? What should be the voltage...
how do i find the amount of lead needed to block 99% of the
gamma radiation ??
LEAD PLATES TOTAL CPM % Radiation Intensity 1 30.94 806 407 2 15 62 c) Co with lead plates: penetration factor (t) of gamma radiation i. In steps c)-e), equation (1) will be solved algebraically using only one value of I/1. and the requisite value of d. In every case, the first plate will cut out the beta particles, so you will be...
Gamma-rays (Y-rays) are highly energetic electromagnetic radiation that are emitted when the nuclei undergo transitions in the energy levels. The energy of the y-rays is upward of 100 keV. Due to the high energy, the rays are not appreciably absorbed by even several centimeters of materials such as concrete or wood. However, dense metals such lead, are effective Y-ray absorbers. The amount y-rays that are absorbed depends on the material and the energy of the gamma-rays, the higher the energy,...
The preloads of the M10 bolts used in a pressure vessel are applied with the wrench shown. For the 16,500 N preload force, Fi, the required torque, T, is approximated as T=K*Fi*d where K-0.20 and d is the nominal bolt diameter. The required torque is developed by applying a force to the end of the wrench as shown. The wrench material is AISI 1035 steel, forged and heat treated. For the applied force, determine the critical failure spot for yielding...
Name: Section: Problem 6 Three materials are used to make a composite beam with a rectangular cross section. Select the transformed section if materials 1 and 3 are transformed into material 2. E, = 10 ksi, Ez = 20 ksi, Ez = 30 ksi Drawn to scale a) b) c) d) e) None of the above MI M2 M3 Problem 7 Determine the polar moment of inertia for the hollow tube. a) 2,789.7 in b) 44,635.7 in c) 25.1 in...
1. The magnetic field of a wave propagating through a certain nonmagnetic material is given by H-x30cos(10%-0. Sy) (mA/m) Find the following: (a) The direction of wave propagation. (b) The phase velocity (c) The wavelength in the material. (d) The relative permittivity of the material (e) The electric field phasor 2. A 60-MHz plane wave traveling in the -x-direction in dry soil with relative permittivity &4 has an electric field polarized along the z-direction. Assuming dry soil to be approximately...
Theory section is below for the equations
PRELAB Read the theory section below. Calculate the photon wavelength in nm corresponding to a photon energy equal to the theoretical band gap energy of S1.121 eV and GaAs, 1.422 eV. These will be used to set the monochromator. THEORY One of the most important characteristics of a semiconductor is its band gap energy Eg Whereas an electron in an isolated atom has discrete energy levels, an electron in a semiconductor crystal has...
question 7 and 8
Purpose To examine the properties of polarized light and the mathematical relationship describing the intensity of linearly polarized light (Malus'law). In addition, the lab will investigate different ways light can be polarized Overview This lab is the first of three labs exploring the properties of electromagnetic waves. Electromagnetic waves are composed of oscillating electric and magnetic fields. As discussed in the lecture the electric and magnetic field vectors are mutually perpendicular to each other. Light waves...