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In a single lens camera with a 35 mm wide film the

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10) In a single lens camera with a 35 mm wide film, the distance from the lens to the film is varied in order to focus on objects at varying distances. Over what range must the distance vary for a lens of 50 mm focal length, if the camera is to be able to focus on objects ranging in distance from infinity down to 1.4 m from the camera? A) 5.56 mm B) 2.59 mm C) 1.48 mm D) 1.85 mm 10) 11) What of the following is a WRONG statement? 11) 12) In order of decreasing wavelength, which of the following is RIGHT? 12) A-2
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13) What of the following is a WRONG statement 13) 14) Consider the waves on a vibrating guitar string and the sound waves the guitar produces in the surrounding air. The string waves and the sound waves have the same A) velocity. B) wavelength. C) amplitude. D) frequency. 14) 15) The siren of an ambulance wails at 3000 Hz when the ambulance is stationary. What frequency will you hear after this ambulance passes you while traveling at 33.60 m/s? The speed of sound is 343.0 m/s. 15) 16) What of the following is a WRONG statement 16)
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