Consider the f(x) = cos(Bx) function shown in the figure in blue color. What is the value of parameter B for this function? This parameter is called angular frequency in physics and it is denoted by w. 0.5 -0.5 -6 -5 4 -3 -2 -1 2 4 6 7 As a reference the g(x) = cos(x) function is shown in red color, and green tick marks are drawn at integer multiples of n. Submit Answer Incorrect. Tries 1/12 Previous Tries

1. Consider two coupled oscillators (see Figure). frequencies, and compare the magnitudes with the natural frequencies of the two oscillators in the absence of coupling. Find the two characteristic ki k12 k2 wwawim/ WOWW

Can you explain how to get 7.2 as the answer?

Question 3 Consider the simple and close-packed hexagonal direct lattices. (a) Find out the general expression for the structure factor for each lattice type. In this context, what is the significance of a complex structure factor? (b) Without resorting to the structure factor, determine in which structure(s) X-ray Bragg reflections arise from the lattice planes (0001), (0002), and (1010). Justify your answer by the use of the above determined structure factor or otherwise and explain the meaning of the four indices describing the above cited lattice planes.