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1-An object is located in air 30 cm from the vertex of a concave surface made...

1-An object is located in air 30 cm from the vertex of a concave surface made of glass with a radius of curvature 10 cm. Where does the image by refraction form? Answer in cm. Use nair = 1 and nglass = 1.5 .

2-In a double-slit experiment, the fifth maximum is 2.8cm from the central maximum on a screen that is 1.5 maway from the slits. If the slits are 0.15 mm apart, what isthe wavelength of the light being used? Answer in nm and round to the nearest integer.

3-For a three-slit interference pattern, find the ratio of the peak intensities of a secondary maximum to a principal maximum. Answer as a decimal rounded to two places.

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