Very much appreciated. I need help on these homework problems and I\'ve visited
ID: 1509918 • Letter: V
Question
Very much appreciated. I need help on these homework problems and I've visited my schools tutors but they're not confident in any of the help they give me and on some they just tried to "steer" me in the right direction and it wasn't helpful. I need this to study from to really understand this material. Very much appreciated. I need help on these homework problems and I've visited my schools tutors but they're not confident in any of the help they give me and on some they just tried to "steer" me in the right direction and it wasn't helpful. I need this to study from to really understand this material. I need help on these homework problems and I've visited my schools tutors but they're not confident in any of the help they give me and on some they just tried to "steer" me in the right direction and it wasn't helpful. I need this to study from to really understand this material. 5· An object is 19.5 cm in front of a converging lens of 10 cm focal length. A second lens is 5 cm to the right of the first lens. If a real image is formed 18.7 cm from the second lens, find the focal length of the second lens
Explanation / Answer
lens 1
u = -19.5 cm
v = ?
f = 10 cm
1/v - 1/u = 1/f
v = 20.52 cm
lens 2
u = 20.52 - 5 = 15.52 cm
v = - 18.7 cm [ real image ]
f = ?
1/v - 1/u = 1/f
so f = -8.4811 cm
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