Q- The laser used in cornea surgery to treat corneal disease is the excimer laser, which emits ultraviolet light with a wavelength of 193 nm in air. The index of refraction of the cornea is 1.376. What are the wavelength and frequency of the light in the cornea?
Q- A string vibrates at its third harmonic frequency. The amplitude at a point 30 cm from one end is half the maximum amplitude. How long is the string?
Q- Two ideal constant voltage sources and six resistors are connected in a circuit as shown. The right most resistor is the load. Using mesh analysis calculate mesh currents I1, I2 and I3.
Q- The leg and cast in the figure weigh W = 210 N, with the center of mass as indicated by blue arrow. The counter balance W1 = 140 N. Determine the weight W2 and the angle α needed so that no force exerted on the hip joint by the leg and cast.
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