Question

What kind of lens (type and focal length) would you need to place
next to a converging lens of focal length 25cm to create a
converging lens with a focal length of 40cm?

Answer #1

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A converging lens with a focal length 16cm is placed 30cm to the
left of a diverging lens with focal length 10cm. A small object
that is 2.2cm tall is placed 40cm to the left of the converging
lens. Where is the image formed by the diverging lens? Give your
answer as a distance from the diverging lens.

This is pertaining to a lab using a convex lens with focal
length 7.5 cm:
a) Set the object distance to an approximate value of 5cm. Move
the white Viewing Screen along the optical bench. Are you able to
see an image on the Viewing Screen? Explain why or why not
conceptually.
b) Is it theoretically possible to create a non-inverted image
with a converging spherical lens? Explain.
c) For the lens that was used in the first portion of...

A converging lens with focal length of 30 cm and a diverging
lens with focal length of 10 cm are 15 cm apart. A 4-cm-tall object
is 10 cm in front of the 30-cm-focal-length lens. Use ray tracing
to find the height of the image in cm

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 20 cm and a diverging
lens with a focal length of -34 cm are 74.0 cm apart. A 2.6-cm-tall
object is 40 cm in front of the converging lens.
1. Calculate the distance between image and diverging lens.
2. Calculate the image height.

A lens with a focal length of 70 mm forms an image of a person
on a digital image sensor. The person is standing 1.4 m away.
1. How far must the lens be from the image sensor in order for
the image of the person to be in focus?
2. What kind of lens must it be to form the image: convex
(converging) or concave (diverging)? Or could it be either
kind?

A diverging lens with a focal length of -11.3 cm and a
converging lens with a focal length of 14.6 cm have a common
central axis. Their separation is 30.9 cm. An object of height 1.0
cm is 33.1 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...

8. [1pt] A 29.1cm focal length converging lens is 18.3cm behind
a diverging lens. Parallel light strikes the diverging lens. After
passing through the converging lens, the light is again parallel.
What is the focal length of the diverging lens?

A diverging lens with a focal length of -14 cm is placed 12 cm
to the right of a converging lens with a focal length of 19 cm . An
object is placed 32 cm to the left of the converging lens.Where
will the image be if the diverging lens is 37 cm from the
converging lens?

A diverging lens with a focal length of -13 cmcm is placed 11
cmcm to the right of a converging lens with a focal length of 22
cmcm . An object is placed 36 cmcm to the left of the converging
lens. a) Where will the final image be located? b)Where will the
image be if the diverging lens is 55 cmcm from the converging
lens?Find the image location relative to the diverging lens.

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