PLEASE SHOW ME HOW TO GET THE CORRECT ANSWER OF 7.25 An object is placed 12 cm i
ID: 1498035 • Letter: P
Question
PLEASE SHOW ME HOW TO GET THE CORRECT ANSWER OF 7.25
An object is placed 12 cm in front of a circular converging mirror. The magnification when placed at this spot is 3.1 and the image is inverted. The object is then moved to a different spot and its image is virtual and located 36 cm from the mirror. Where was the object placed when it was moved in cm?
AGAIN PLEASE ONLY SHOW ME HOW TO GET THE CORRECT ANSWER OF 7.25
An object is placed 12 cm in front of a circular converging mirror. The magnification when placed at this spot is 3.1 and the image is inverted. The object is then moved to a different spot and its image is virtual and located 36 cm from the mirror. Where was the object placed when it was moved in cm?
Correct Answer:7.25 ± 10%
AGAIN PLEASE ONLY SHOW ME HOW TO GET THE CORRECT ANSWER OF 7.25
Explanation / Answer
When An object is placed 12 cm in front
=> v = 3.1 * 12 = 37.2 cm
=> 1/f = 1/37.2 + 1/12
=> f = 9.073 cm -------------------> focal length of mirror
When The object is then moved to a different spot
=> 1/u = 1/9.073 + 1/36
=> u = 7.25 cm
=> the object placed when it was moved = 7.25 cm
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