= -r2 = 40mm) is placed in the air (n = 1.0). An object (A) is Assume that a thin lens (r placed in the left side of lens (d = 45mm) and the image of the object is located in the right side of the lens at position (B) (d' = 90mm). 1) Compute the refraction index of the lens (n1); 2) If placing another negative thin lens (f2 = -180mm) immediately behind the first lens to create a doublet lens in which the spacing between two lenses is zero (as shown in the right figure), what is the focal length of this doublet? 3) Where is the final image position (C) of the object (A) through this new doublet? (Note: Assuming this doublet lens is a combined thin lens too without considering its thickness).
= -r2 = 40mm) is placed in the air (n = 1.0). An object (A) is Assume that a thin lens (r placed in the left side of lens (d = 45mm) and the image of the object is located in the right side of the lens at position (B) (d' = 90mm). 1) Compute the refraction index of the lens (n1); 2) If placing another negative thin lens (f2 = -180mm) immediately behind the first lens to create a doublet lens in which the spacing between two lenses is zero (as shown in the right figure), what is the focal length of this doublet? 3) Where is the final image position (C) of the object (A) through this new doublet? (Note: Assuming this doublet lens is a combined thin lens too without considering its thickness).
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Transcribed Image Text:= 1.0). An object (A) is
Assume that a thin lens (r,
placed in the left side of lens (d = 45mm) and the image of the object is located in the right side of the
lens at position (B) (d' = 90mm).
1) Compute the refraction index of the lens (n2);
= -r2 = 40mm) is placed in the air (n
2) If placing another negative thin lens (f2 = -180mm) immediately behind the first
lens to create a doublet lens in which the spacing between two lenses is zero (as
shown in the right figure), what is the focal length of this doublet?
3) Where is the final image position (C) of the object (A) through this new doublet?
(Note: Assuming this doublet lens is a combined thin lens too without considering its
thickness).
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