2. The figure below shows a pair of lenses that act as an objective lens for...

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2. The figure below shows a pair of lenses that act as an objective lens for a telescope: 2.28 UNITS: mm The first lens has radii and thickness R1 = 52.52 mm, d = 2.30 mm, R = -25.731 mm and is formed of FK51 glass with a refractive index of 1.4865 at 588 nm. The second lens has radii and thickness R21 = -25.731 mm, d = 1.50 mm, R22 = -166.165 mm and is formed of FK51 glass with a refractive index of 1.4865 at 588 nm. They are spaced by 0.3826 mm. a) For each lens calculate the effective focal length, front focal length and back focal length. Also calculate the location of the principal planes. [10 points] b) Calculate the location of the principal planes for the lens combination, and from this calculate the effective focal length, front focal length and back focal length of the compound system. [10 points] 2. The figure below shows a pair of lenses that act as an objective lens for a telescope: 2.28 UNITS: mm The first lens has radii and thickness R1 = 52.52 mm, d = 2.30 mm, R = -25.731 mm and is formed of FK51 glass with a refractive index of 1.4865 at 588 nm. The second lens has radii and thickness R21 = -25.731 mm, d = 1.50 mm, R22 = -166.165 mm and is formed of FK51 glass with a refractive index of 1.4865 at 588 nm. They are spaced by 0.3826 mm. a) For each lens calculate the effective focal length, front focal length and back focal length. Also calculate the location of the principal planes. [10 points] b) Calculate the location of the principal planes for the lens combination, and from this calculate the effective focal length, front focal length and back focal length of the compound system. [10 points]