Two lenses are separated by L = 50.0 cm. The first lens (light
coming from the left.) has a focal length f1 = 24.0 cm and the
second lens has a focal length f2 = 18.0 cm. An object is located
40.0 cm (s1) to the left of the first lens. Calculate the position
of the two images formed by the lens system. State whether each
image is real or virtual. Repeat this problem with L = 10.0 cm.
Two identical diverging lenses are separated by 17 cm. The focal
length of each lens is -8.0 cm. An object is located 4.0 cm to the
left of the lens that is on the left. Determine the final image
distance relative to the lens on the right.
Two converging thin lenses (f1 = 15 cm and f2 = 20 cm) are
separated by 25 cm. A
candle is placed in 40 cm in front of the first lens.
a) Where will the image of the candle be created by the two-lens
system?
b) Describe the properties of the image.
c) Describe how the image changes as the lenses are moves closer
together.
d) The lenses are now moved right next to each other. What is
the equivalent...
Two concave lenses, each with f = -16 cm, are separated by 6.5 cm.
An object is placed 30 cm in front of one of the lenses. Part A)
Find the location of the final image produced by this lens
combination. cm in front of the lens closest to the object Part B)
Find the magnification of the final image produced by this lens
combination. Express your answer using two significant figures.
Two converging lenses
(f1 = 9.40 cm
and
f2 = 5.50 cm)
are separated by 17.9 cm. The lens on the left has the longer
focal length. An object stands 12.4 cm to the left of the left-hand
lens in the combination. Locate the final image relative to the
lens on the right. Obtain the overall magnification. Is the final
image real or virtual? With respect to the original object, is the
final image upright or inverted and is it...
Imagine you have two converging lenses. Lens A has a focal
length of 12.5 cm. Lens B has a focal length of 50.0 cm. The
diameter of each lens is 6.50 cm. Assume a near point of 25.0
cm.
a) How could you make a microscope with
4x magnification using these lenses?
b) How could you make a telescope with
4x magnification using these lenses?
c) Which of these is more practical?
Why?
A two lens magnifying system uses lenses of focal lengths 2.5
and 9.5 cm for the objective and eyepiece, respectively. The two
lenses are positioned 23 cm apart. An object for study is placed
3.0 cm in front of the objective lens. Find the magnification of
the final image.
A single bi-convex lens (a lens with two convex
surfaces) made of glass (index of refraction n = 1.55) has surfaces
with radii of curvature r1 = 27.0 cm and r2 =
-27.0 cm. a)What is the focal length of the lens in air?
b)If an object is placed at p = 39.7 cm from the lens, where is the
image? (Use plus sign for a real image, and minus sign for a
virtual image.)
c)If the object has a...
The figure below shows two converging lenses placed
L1 = 23 cm apart. Their focal lengths are f1
= 10 cm and f2 = 25 cm.
(a)
Where is the final image located for an object that is
L2 = 32 cm in front of the first lens? (Measure this
distance (in cm) relative to the lens of focal length
f2.)distance cmdirection ---Select--- to the
left of the lens to the right of the lens
(b)
What is the total...