Question

A 15-cm-focal-length converging lens is 19 cm to the right of a 7.0-cm-focal-length converging lens. A 1.6-cm-tall object is distance L to the left of the first lens.

For what value of L is the final image of this two-lens system halfway between the two lenses?

Express your answer to two significant figures and include the appropriate units.

What is the height of the final image?

Express your answer to two significant figures and include the appropriate units.

What is the orientation of the final image?

inverted |

upright |

Answer #1

A 15-cm-focal-length converging lens is 19 cm to the right of a
7.0-cm-focal-length converging lens. A 1.6-cm-tall object is
distance L to the left of the first lens.
Part A
For what value of L is the final image of this two-lens system
halfway between the two lenses?
Express your answer to two significant figures and include the
appropriate units.
L
L
=
Part B
What is the height of the final image?
Express your answer to two significant figures...

A 15-cm-focal-length converging lens is 20 cm to the right of an
8.0-cm-focal-length converging lens. A 2.9-cm-tall object is
distance L to the left of the first lens.
Part A) For what value of L is the final image of this two-lens
system halfway between the two lenses?
Part B) What is the height of the final image?

A converging lens with a focal length of 60 cm and a diverging
lens with a focal length of -70 cm are 310 cm apart. A 2.7-cm-tall
object is 80 cm in front of the converging lens.
Calculate the distance between the final image and the diverging
lens.
Express your answer to two significant figures and include the
appropriate units.
Calculate the image height.
Express your answer to two significant figures and include the
appropriate units.

A diverging lens with a focal length of -19.7 cm and a
converging lens with a focal length of 11.0 cm have a
common central axis. Their separation is 39.5 cm. An
object of height 1.1 cm is 26.4 cm in front of
the diverging lens, on the common central axis. Find the location
of the final image produced by the combination of the two
lenses.
Where is the image located as measured from the converging
lens?
What is the...

Two lenses, one converging with focal length 21.0 cm and one
diverging with focal length − 12.0 cm , are placed 25.0 cm apart.
An object is placed 60.0 cm in front of the converging lens.
Part A
Find the final image distance from second lens. Follow the sign
conventions.
Express your answer to two significant figures and
Part B
Determine the magnification of the final image formed. Follow
the sign conventions.
Express your answer using two significant figures
include...

Two converging lenses with focal lengths of 50 cm and 22 cm are
13 cm apart. A 2.0-cm-tall object is 25 cm in front of the
50-cm-focal-length lens.
Part A
Calculate the distance between the image and 22-cm-focal-length
lens.
Express your answer to two significant figures and include the
appropriate units.
Part B
Calculate the image height.
Express your answer to two significant figures and include the
appropriate units.

A converging lens with a focal length of +30 cm is placed 40 cm
to the left of a diverging lens with a focal length of -40 cm. An
object is placed 60 cm to the left of the converging lens. What is
the location and orientation of the image produced by the
combination of lenses?
Why is the answer B?
(a) Upright, on the right of the diverging lens and larger than
the main object
(b) Inverted, on the...

Two converging lenses are placed 40.0 cm apart. The focal length
of the lens on the right is 21.0 cm , and the focal length of the
lens on the left is 10.5 cm . An object is placed to the left of
the 10.5 cm focal-length lens. A final image from both lenses is
inverted and located halfway between the two lenses.
How far to the left of the 10.5 cmcm focal-length lens is the
original object?

Two converging lenses, the first with focal length 40 cm and the
second with focal length 33 1/3 cm, are separated by 10.0 cm. An
object of height 6.0 cm is placed 20.0 cm in front of the first
lens. What are the size and orientation of the final image?
1.5 cm, inverted
24 cm, inverted
6.0 cm, inverted
24 cm, upright
6.0 cm, upright

A converging lens with a focal length of 94.0 cm forms an image
of a 3.05 cm -tall real object that is to the left of the lens. The
image is 4.65 cm tall and inverted.
Where are the object and image located in relation to the
lens?
Express your answers using three significant figures separated by a
comma.

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