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When an object is placed 120 cm in front of a spherical refracting surface with a...

When an object is placed 120 cm in front of a spherical refracting surface with a -27 cm radius of curvature, the image distance is +690 cm. If the index of refraction of the surrounding material is 2.3, what is the index of refraction of the refracting material?

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Answer #1

Equation of spherical surface,

is the object distance,

is image distance

Radius of spherical surface

Index of refraction of surrounding material

Index of refraction of refracting material

Refractive index of refracting material is

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