Two thin lenses, with focal lengths of 25.0 cm and -30.0 cm are placed in contact...

Question

Question

Two thin lenses, with focal lengths of 25.0 cm and -30.0 cm are placed in contact in an orientation so that their optic axes coincide. What is the focal length of the two in combination?

Answer 1

Answer #1

If you liked the answer then give a thumb up.

Answer 2

Similar Homework Help Questions

Two thin lenses of focal lengths 86 mm and -92 mm are placed in contact. What...

Two thin lenses of focal lengths 86 mm and -92 mm are placed in contact. What power must a third lens have so that when the three are in contact the combination has a focal length of -45 mm? ANS...... diopters
10. Two lenses are in contact. One of the lenses has a focal length of +10.0cm...

10. Two lenses are in contact. One of the lenses has a focal length of +10.0cm when used ale When the two are in combination, an object 20.0cm away from the lenses forms a reali 40.0cm away from the lenses. What is the focal length of the second lens? Show your w 9. One lens has a focal length of +15.0 cm. A second lens of focal length +20.0cm is placed in contact with the first lens. What is the...
When two thin lenses are in contact, the combination may still be considered as a thin...

When two thin lenses are in contact, the combination may still be considered as a thin lens. The focal distance of the combination, fc, is given by 1 1 1 + eq. (1) fcff2 where fi and f are the focal distances of the two lenses in contact. Assume two converging lenses (10 cm and 20 cm focal distances) are in contact and da = 15 cm. a) Calculate the image distance (d) and magnification (m.) for the combination. (2...

Two converging lenses, with focal lengths of f1 = 10.0 cm and f2 = 15.0 cm,...

Two converging lenses, with focal lengths of f1 = 10.0 cm and f2 = 15.0 cm, respectively, are placed 40.0 cm apart. An object is placed 60.0 cm in front of the first lens. (a) Calculate the position, with respect to the second lens, of the final image formed by the combination of the two lenses. (b) Calculate the overall magnification of the final image formed by the combination of the two lenses.
Three thin lenses with focal lengths of .1m, .2m, .3m are placed next to each other....

Three thin lenses with focal lengths of .1m, .2m, .3m are placed next to each other. What is the equivalent focal length of a single lens?
Two positive thin lenses are separated by a distance of d. The focal lengths of the...

Two positive thin lenses are separated by a distance of d. The focal lengths of the lenses are f_1 = 10 cm and f_2 = 20 cm. The desired throw of the system, the object to image distance, is T = 80 cm and the desired magnification is M = -1.1. a) Use what you know about the conjugate matrix for a two lens system to solve to the distance between the lenses. Express your answer in cm. b) Where...

Two thin lenses with focal lengths of magnitude 18.0 cm, the first diverging and the second...

Two thin lenses with focal lengths of magnitude 18.0 cm, the first diverging and the second converging, are placed 11.00 cm apart. An object 3.70 mm tall is placed 4.75 cm to the left of the first (diverging) lens. (a) Where is the image formed by the first lens located? (b) How far from the object is the final image formed? (c) Is the final image real or virtual? (d) What is the height of the final image? (e) Draw...
2. An object is placed in front of two thin symmetrical convex lenses with focal lengths...

2. An object is placed in front of two thin symmetrical convex lenses with focal lengths of F1 +10 cm and F25 cm, with a lens separation of D-42 cm. The object is 15.0 cm from lens 1. Where is the final image of the object and what is its magnification? (10 points) [Please use reverse side if you need more room. Circle the correct descriptors: real virtual enlarged reduced erect inverted Answer: X final = ML =
Optics

You combine two thin lenses by placing them in contact so that their axes coincide, forming what is called a compound lens. The focal lengths of the lenses are 22.9 cm and −57.1 cm, respectively. Find the focal length of this compound lens. Does this compound lens act as a diverging lens, as a converging lens, or it cannot be determined?

Two converging lenses L1 and L2 have focal lengths of 28 cm and 15 cm , respectively. The lenses are placed 68 cm apart...

Two converging lenses L1 and L2 have focal lengths of 28 cm and 15 cm , respectively. The lenses are placed 68 cm apart along the same axis, and an object is placed 52 cm from L1 (120 cm from L2 ). Where is the image formed relative to L2 ? What is its magnification?