The figure below shows an example of the two-lens method of determining the focal length of a concave lens. The convex lens has a known focal length, while the concave lens has an unknown focal length. The real image formed by the first lens serves as the object for the second lens. Based on the image formed by this set-up, what is the focal length of the concave lens in cm? (HINT: Remember that the focal length of a concave lens is negative.) Round off your answer to ones place (whole number). 60 40 20 0. 2F -20 -40 -60 -80 -80 -60 -40 -20 40 60 80 100 120 20 2-

The figure below shows an example of the two-lens method of determining the focal length of a concave lens. The convex lens has a known focal length, while the concave lens has an unknown focal length. The real image formed by the first lens serves as the object for the second lens. Based on the image formed by this set-up, what is the focal length of the concave lens in cm? (HINT: Remember that the focal length of a concave lens is negative.) Round off your answer to ones place (whole number). 60 40 20 0. 2F -20 -40 -60 -80 -80 -60 -40 -20 40 60 80 100 120 20 2-

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter2: Geometric Optics And Image Formation

Section: Chapter Questions

Problem 110P: An object of height 3 cm is placed at 25 cm in front of a converging lens of focal length 20 cm....

See similar textbooks

Similar questions

What is the magnification of a magnifying lens with a focal length of 10 cm if it is held 3.0 cm from the eye and the object is 12 cm from the eye?
What will be the formula for the angular magnification of a convex lens of focal length f if the eye is very close to the lens and the near point is located a distance D from the eye?
What will be the angular magnification of a convex lens with the focal length 2.5 cm?
In a reflecting telescope the objective is a concave mirror of radius of curvature 2m and an eyepiece is a convex lens of focal length 5 cm. Find the apparent size of a 25-m tree at a distance of 10 km that you would perceive when looking through the telescope.
Let objective and eyepiece of a compound microscope have focal lengths of 2.5 cm and 10 cm, respectively and be separated by 12 cm. A 70- mobject is placed 6.0 cm from the objective. How large is the virtual image formed by the objective-eyepiece system?
A concave mirror of radius of curvature 10 cm is placed 30 cm from a thin convex lens of focal length 15 cm. Find the location and magnification of a small bulb sitting 50 cm from the lens by using the algebraic method.
Under what circumstances will an image be located at the focal point of a spherical lens or mirror?
A group of students is given two converging lenses. Lens A has a focal length of 12.5 cm, and lens B has a focal length of 50.0 cm. The diameter of each lens is 6.50 cm. The students are asked to construct a microscope from these lenses that has the same magnification as the telescope in Problem 80 if possible, and they have this discussion: Avi: These are the same lenses we used to make a telescope. So they wont work as a microscope. Microscopes are for looking at close objects; telescopes are for looking at far objects. Cameron: All you need for a microscope are two converging lenses. I think the difference from a telescope is just that the order of the lenses is switched. A microscope is just a backward telescope. Shannon: I think the order of the lenses doesnt matter because the magnification is inversely proportional to both focal lengths. I think we have to adjust the distance between the lenses. a. What do you think? b. If a microscope can be constructed with these two lenses, describe its design. What is the minimum separation of the lenses? Where must you place the object?
You view an object by holding a 2.5 cm-focal length magnifying glass 10 cm away from it. How far from your eye should you hold the magnifying glass to obtain a magnification of 10 ?
The objective and the eyepiece of a microscope have the focal lengths 3 cm and 10 cm respectively. Decide about the distance between the objective and the eyepiece if we need a 10 x magnification from the objective/eyepiece compound system.
An object viewed with the naked eye subtends a 2° angle. If you view the object through a 10 x magnifying glass, what angle is subtended by the image formed on your retina?
A thin lens has two focal points, one on either side of the lens at equal distances from its center, and should behave the same for light entering from either side. Look backward and forward through a pair of eyeglasses and comment on whether they are thin lenses.