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1. A 3.50 mm object is placed 13.0 cm in front of a lens that has...

1. A 3.50 mm object is placed 13.0 cm in front of a lens that has a focal length of -6.50 cm, a second lens is 25.0 cm from the first and has a focal length of 9.00 cm. What is the final height of the image formed, is it virtual or real?

2. Assuming the lenses of a person's eyeglasses are 2.10 cm from their eyes, what power of lens must be used to correct the vision of a nearsighted person whose far point is 1.70 m?

3. A goldfish bowl is spherical. A goldfish is swimming 8.50 cm from the wall of the bowl. It appears to be at a distance of 7.50 cm, what is the radius of curvature of the bowl? The index of refraction of water is 1.33.

4. A man's face is 50.0 cm in front of a concave spherical shaving mirror. If the image is upright and 1.25 times as large as his face, what is the focal length of the mirror?

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