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A.) A scuba diver, submerged under water, looks up and sees sunlight at an angle of...

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Physics

A.) A scuba diver, submerged under water, looks up and seessunlight at an angle of 11.0° from the vertical. At what angle,measured from the vertical, does this sunlight strike the surfaceof the water? Assume water has a refraction index of 1.333.

B.) To focus a camera on objects at different distances, theconverging lens is moved toward or away from the image sensor, so asharp image always falls on the sensor. A camera with a telephotolens (f = 400 mm) is to be focused on an object locatedfirst at a distance of 3.5 m and then at 50.0 m. Over what distancemust the lens be movable?

C.) A layer of oil (n = 1.45) floats on an unknownliquid. A ray of light originates in the oil and passes into theunknown liquid. The angle of incidence is 55.0 degrees, and theangle of refraction is 59.1 degrees. What is the index ofrefraction of the unknown liquid?

D.) A ray of sunlight is passing from diamond into crown glass;the angle of incidence is 25.60°. The indices of refraction for theblue and red components of the ray are: blue(ndiamond = 2.444, ncrownglass = 1.531), and red (ndiamond =2.410, ncrown glass = 1.520). Determine theangle between the refracted blue and red rays in the crownglass.

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