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A good quality camera “lens” is actually a system of lenses, rather than a single lens, but a side effect is that a reflection from the surface of one lens can bounce around many times within the system, creating artifacts in the photograph. To counteract this problem, one of the lenses in such a system is coated with a thin layer of material
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- Students determine the refractive index of a substance by way of experiment. The students shine a laser in a piece of glass that is immersed in an unknown substance. They increase the angle of incidence until the light is only reflected (not transmitted to the outside substance) and record the critical angle as 63 degrees. The index of refraction of the known substance is 1.52. What is the index of refraction of the unknown substance that surrounds the glass? 63° n = 1.52 1.74 1.35 1.52 1.00arrow_forwardUsing filters, a photographer has created a beam of light that consists of three wavelengths: 400 nm (violet), 500 nm (green), and 650 nm (red). He aims the beam so that it passes through air and then enters a block of crown glass. The beam enters the glass at an incidence angle of θ1 = 21.4°. The glass block has the following indices of refraction for the respective wavelengths in the light beam. wavelength (nm) 400 500 650 index of refraction n400 nm = 1.53 n500 nm = 1.52 n650 nm = 1.51 (a) Upon entering the glass, are all three wavelengths refracted equally, or is one bent more than the others? (b) What are the respective angles of refraction (in degrees) for the three wavelengths? (Enter each value to at least two decimal places.) (i) θ400 nm ° (ii) θ500 nm ° (iii) θ650 nm °arrow_forwardThe radii of curvature of the faces of a double convex lens are 10 cm and 15 cm. Its focal length is 12 cm. What is the refractive index of glass?arrow_forward
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