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I need some help for a-d. Thank you.
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The following imaging system is made of two lenses of focal length f₁ = 100 mm and f₂ = 250 mm with negligible thicknesses. The stop has a diameter of 30 mm. The distances between the stop and the lenses are t₁ = 25 mm and t₂ = 30 mm. Stop f₂ t₁ (NOT drawn to scale) (a) Find the effective focal length of the system. (b) (c) Find the locations of the entrance pupil and the exit pupil. Find the diameters of the entrance pupil and the exit pupil. Find the locations of the two principal planes. (d) t₂ (3 marks) (3 marks) (3 marks) (4 marks)