A concave mirror produces a real image that is three times aslarge as the object
ID: 1672184 • Letter: A
Question
A concave mirror produces a real image that is three times aslarge as the object. If the object is 22 cm in frontof the mirror, what is the image distance? What is the focal length of thismirror? A concave mirror produces a real image that is three times aslarge as the object. If the object is 22 cm in frontof the mirror, what is the image distance? What is the focal length of thismirror? If the object is 22 cm in frontof the mirror, what is the image distance? What is the focal length of thismirror?Explanation / Answer
Given that hi = 3 ho A) do = 22 cm We know that magnification hi / ho = - di /do ==> di = - (-hi *do / ho) = 3 * ho * 22 / ho = 66 cm B) We know that 1 / f = 1 /do + 1 /di = 1 / 22 +1 / 66 = 0.03333 ==> f = 16.50 cm