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Calculate the focal length of a lens in water, given that

Chapter 26, Problem 126PP

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QUESTION:

Problem 126PP

Calculate the focal length of a lens in water, given that the index of refraction of the lens is nlens = 1.52 and its focal length in air is 25.0 cm. (Refer to Table.)

A. 57.8 cm

B. 66.0 cm

C. 91.0 cm

D. 104 cm

Questions & Answers

QUESTION:

Problem 126PP

Calculate the focal length of a lens in water, given that the index of refraction of the lens is nlens = 1.52 and its focal length in air is 25.0 cm. (Refer to Table.)

A. 57.8 cm

B. 66.0 cm

C. 91.0 cm

D. 104 cm

ANSWER:

Step 1 of 2

Here we need to find the focal length of the given lens when it is immersed in water. The given lens is having a focal length in air as  and refractive index .

Given data,

Focal length of lens in air,

Refractive index of lens,

From Table 26-2, we have

Refractive index of water,

To find,

Focal length of lens in water,

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