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Consider a convex mirror with an object placed 20 cm away and a virtual image 15...

Consider a convex mirror with an object placed 20 cm away and a virtual image 15 cm into the mirror. The image appears to be 2 cm tall

a) What is the focal length of the mirror?

b) How large is the object?

c) Adding a convex convex lens at a distance of 10 cm from the object (halfway between the object and the mirror), with a focal length of 6 cm, where would the final image appear?

d) Removing the lens and moving the object towards the mirror at 1 cm/s, how fast would the image move towards the object?

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