Assume that a certain concave spherical mirror has a focal length of 11.9 cm. (a

Question

Assume that a certain concave spherical mirror has a focal length of 11.9 cm. (a) Locate the image and find the magnification for an object distance of 29.8 cm. (If the image location or magnification is infinite, type INFINITY.) q = Correct: Your answer is correct. cm M = Correct: Your answer is correct. (b) Do the same for an object distance of 11.9 cm q = Correct: Your answer is correct. cm M = Correct: Your answer is correct. (c) Do the same for an object distance of 5.95 cm. q = Correct: Your answer is correct. cm M = Correct: Your answer is correct. UNKNOWN: Use the values from PRACTICE IT to help you work this exercise. If the object distance is 23.8 cm, find the image distance and the magnification of the mirror. q = cm M =

Explanation / Answer

a).u=29.8 f=11.9 1/f =1/v + 1/u 1/11.9 = 1/v + 1/29.8 v=19.8 cm magnification m=v/u=19.8/29.8 =0.66 b).if u=11.9 then 1/v=0 means image is formed at infinity thus magnifiaction is infinite c).if u=5.95 then 1/11.9=1/5.95+ 1/v v=-11.9 cm means image formed is virtual M=-v/u=11.9/5.95=2

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