The results of Huy’s eye exam show that he is nearsighted. Which explanation should Huy expect to hear?

A.“You need convex lenses to shorten the distance that light takes to focus in your eyes.”
B.“You need concave lenses to shorten the distance that light takes to focus in your eyes.”
C.“You need convex lenses to lengthen the distance that light takes to focus in your eyes.”
D.“You need concave lenses to lengthen the distance that light takes to focus in your eyes.”

Fft review: linspace, fs, fftshift, nfft 1. generate one second of a cosine of w,-10hz sampled at f, = 100hz and assign it to x. define a tt as your time axis 2. take 64 points fft. 3. as you remember, the dft (which the fft implements) computes n samples of s2t where k-0,1,2, n -1. plot the magnitude of this 64-points fft at range 0 to 63, what do you think of this graph? 4â·to get the x-axis into a hz-frequency form, plot this 64-points fft between-50 to 50 (the 100hz sampling rate) and have n-points between them. 5. according to your figure, what frequency is this cosine wave at? 6. remember that the fft is evaluating from 0 to 2ď€. we are used to viewing graphs from-ď€ to ď€. therefore, you need to shift your graph. 7. now according to your shifted graph. what frequency is this at? 8. note that the spikes have long drop-offs? try a 1024-point dft. note that the peak is closer to 10 and the drop-off is quicker. although, now sidelobes are an issue

What are similarities and differences between refraction, reflection, diffraction and absorption?

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?