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Sati [7]
3 years ago
12

Light my fire! Mix me with cerium and we’ll make beautiful mischmetal together!

Physics
2 answers:
Vika [28.1K]3 years ago
7 0

Answer:HAHAHAHHAHHA

Explanation:

Kay [80]3 years ago
7 0
-uhhhhhhhhhhhhhhhhhhhh
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3 0
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A person can see clearly up close but cannot focus on objects beyond 75.0 cm. She opts for contact lenses to correct her vision.
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Answer:

(a) nearsighted

(b) diverging

(c) the lens strength in diopters is 1.33 D, and considering the convention for divergent lenses normally prescribed as: -1 33 D

Explanation:

(a) The person is nearsighted because he/she cannot see objects at distances larger than 75 cm.

(b) the type of correcting lens has to be such that it counteracts the excessive converging power of the eye of the person, so the lens has to be diverging (which by the way carries by convention a negative focal length)

(c) the absolute value of the focal length (f) is given by the formula:

f=\frac{1}{d} =\frac{1}{0.75} = 1.33\,D

So it would normally be written with a negative signs in front indicating a divergent lens.

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