Question 9: a) The contrast transfer function, H, can sometimes be written as a product of two terms: H(u)=E(u)B(u) Within the weak phase object approximation, the B(u) term can be simplified to B(u)=exp(iχ(u))∼sin χ(u) and E(u) is referred to as the envelope function. Which lens is most closely associated with the contrast transfer function what lens parameters are the most important? (2) Discuss the factors that contribute to E(u). (2) b) You make measurements of the contrast transfer function of a TEM operating at 300 kV.  The contrast transfer function measured at 3 different defocus values are shown below.  The orange curve is the envelop function and the gray curve is the contrast transfer function. You are interested in studying a sample with important Miller plane spacings of 2.3 and 1.9Å.   Explain the advantages and disadvantages of using each of the three imaging condition to investigate your sample.  Which condition is best and why?  (4) Estimate the spherical aberration coefficient.  (2)

Question 8:                                                       (6) Which of the following statements is true about extinction distance:  It depends on the arrangement of atoms in a crystal or the miller indices It depends on the wavelength of the electron beam  It depends on the density of the material  It depends on the nature of the electron beam (incident or diffracted)   

Part 2: Attempt any three. Each question is 10 points. Show all of your work and clearly identify your answers.

Question 5:                                                              (4) At a reciprocal vector of u, the contrast transfer function is zero, the effect on the image is to:    Extinguish the fringes of spacing u Extinguish the fringes of spacing 1/u Reverse the contrast of fringes of spacing u Reverse the contrast of fringe of spacing 1/u It depends on how other values of u are affected so that the fringe visibility can be determined.  

Zara Owner Inditex’s Sales Grow as It Holds Off on Major Price Hikes – WSJ 11 01 2024.pdf Based SOLELY on the article above (ABSOLUTELY NOTHING FROM THE INTERNET – IF SO, THE WHOLE QUESTION WILL BE GRADED ZERO!): In a SWOT analysis approach (without using the 4 quadrants), please mention 3 Strengths, 1 Weakness, 3 Opportunities, and 1 Threat – ONLY based on the content within the article. REMEMBER: Strengths and Weaknesses are meant to be INTERNAL; whereas Opportunities and Threats are meant to be EXTERNAL! Avoid repeating the same strength or weakness, etc., in different words or sections from the article. So 8 answers in total. 1.5 points each. Strengths: 1. 2. 3. Weaknesses: 1. Opportunities: 1. 2. Threats: 1. 2.

During adolescence, the connection between the prefrontal cortex and the subcortical structures in the brain are strengthening and becoming faster. It now becomes easier for older adolescents to:

Camille, age 14, is learning new social skills. Who is she MOST likely learning them from?

The practice of grouping students with similar achievement scores and offering them a school curriculum that matches their interests and abilities is known as:

Fifteen-year-old Tamara quietly _____ bullying on her computer and in her community. She feels anxious and nervous in school.

The experts do agree that too much time spent using technology can be problematic if it _____ like getting enough sleep, exercising, and completing school assignments.