Children of the Moken tribe spend much of their days foraging for food underwater. Their eyes are adapted to this; their lenses are capable of more accommodation and, when they dive, their pupils contract. increased
1.00
1.33
1.38
decreased
a. The indices of refraction for the lens of the eye and for water very similar.
b. This means the refractive power of the lens of the eye is when a person is underwater (unless they wear goggles). c. This can be corrected (at least partially) if the curvature of the lens is (larger accomodation).
d. We also know that a wide aperture can result in blurriness, so, to further reduce the blurriness associated with underwater vision, the pupil's diameter should be (as in a pinhole camera).

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

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp