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please help with the following questions (a) (1) State the Anex of refraction 123 A beam of light travelling in air in @ 1.0) enters

please help with the following questions

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(a) (1) State the Anex of refraction 123 A beam of light travelling in air in @ 1.0) enters a block of flint glass (n 1.63) at an angle of incidence of 50. Find the angle of refraction. An object 1.0 em high is placed in an upright position 20.0 crn from a concave mirror whose focal length is 35 on Find the location and sure of the image

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