Problem 33.46 A person has a far point of 12 cm . Part A What power glasses woul

Question

Problem 33.46

A person has a far point of 12 cm .

Part A

What power glasses would correct this vision if the glasses were placed 2.0 cm from the eye?

Express your answer using two significant figures.

What power contact lenses, placed on the eye, would the person need?

Express your answer using two significant figures.

Problem 33.46

A person has a far point of 12 cm .

Part A

What power glasses would correct this vision if the glasses were placed 2.0 cm from the eye?

Express your answer using two significant figures.

What power contact lenses, placed on the eye, would the person need?

Express your answer using two significant figures.

Explanation / Answer

a)

do = image distance = 2 cm = 0.02

di = image distance = - 10 cm = - 0.10 m

P = 1/di + 1/do = 1/(-0.10) + 1/0.02 = 40

part b)

do = image distance = infinite

di = image distance = - 12 cm = - 0.12 m

f = focal length

Using the formula

P = 1/di + 1/do = 1/(-0.12) + 1/0

P = 8.33

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