Question

You are marooned on a tropical island. Design a telescope from a cardboard map tube and the lenses of your eyeglasses. One lens has a +1.0-m focal length and the other has a +0.30-m focal length. The telescope should allow you to view an animal 100 m from the objective with the final image being formed 1.0 m from the eyepiece.

1)

Determine the required distance between lenses.

Express your answer with the appropriate units.

Answer #1

Determine the lens separation and object location for a
microscope made from an objective lens of focal length +1.1-cm and
an eyepiece of focal length +4.0-cm. Arrange the lenses so that a
final virtual image is formed 100 cm to the left of the eyepiece
and so that the angular magnification is -260 for a person with a
near point of 25.
B:Determine the distance between the objective lens and the
eyepiece. Express your answer with the appropriate units.
Answer...

(1)(A)Your physics study partner is nearsighted. She has a near
point of 50.0 cm from her eyes and she wears eyeglasses designed to
allow her to read a newspaper held at a distance of 22.5 cm from
her eyes. Determine the focal length of her glasses for each of the
following cases. She wears her eyeglasses 1.80 cm from her eyes.
She wears her eyeglasses 2.80 cm from her eyes.
(B)What magnification is produced by a 0.150 cm focal length...

Build a microscope that can double the size of an object. We
need to choose two converging lenses from these available lenses
with focal lengths 2,4,8, and 12 meters.
First choose an objective lens focal length, and a distance to
place the object from the lens.
Then choose an eyepiece lens focal length and a distance to
place the lens from the objective lens.
Draw your microscope design including a ray diagram.
Your diagram should include:
1. Location and properties...

The focal length of the objective lens in a microscope is 0.270
cm, and an object is placed 0.275 cm from the objective.
a. How far from the objective lens will the objective image be
formed?
b. If the image of this object is viewed with the eyepiece
adjusted for minimum eyestrain (image at the far point of the eye)
for a person with normal vision. What is the needed focal length of
the eyepiece lens if the distance between...

Please explain, walkthrough, and show equations.
The focal length of the objective lens in a microscope is 0.270
cm, and an object is placed 0.275 cm from the objective.
a. How far from the objective lens will the objective image be
formed?
b. If the image of this object is viewed with the eyepiece
adjusted for minimum eyestrain (image at the far point of the eye)
for a person with normal vision. What is the needed focal length of
the...

An insect 0.80 mm tall is placed 1.0 mm beyond the focal point
of the objective lens of a compound microscope. The objective lens
has a focal length of 12 mm, the eyepiece has a focal length of 26
mm
Part A: Where is the image formed by the objective
lens? Give your answer as the distance from the image to the lens.
Express your answer in millimeters to two significant figures.
Part B: What is the magnification, including the correct...

The telescope at a small observatory has objective and eyepiece
focal lengths respectively of 18.2 m and 12 cm. If this telescope
is used to view a 2000 m diameter lunar crater on the surface of
the moon 3.77 108 m from the surface of the Earth, determine the
following.
(a) angular magnification of the telescope
(b) size of the first image ____ m
(c) length of the barrel of the telescope _____ m
(d) angle subtended at the unaided...

The telescope at Yerkes Observatory in Wisconsin has an
objective whose focal length is 19.4 m. Its eyepiece has a focal
length of 10.0 cm. (a) What is the angular magnification of the
telescope? (b) If the telescope is used to look at a lunar crater
(diameter = 5130 m), what is the size of the first image, assuming
the surface of the moon is 3.77 × 108 m from the surface of the
earth? (c) How close does the...

Suppose that you wish to construct a telescope that can resolve
features 9.0 km across on the moon, 384,000 km away. You have a 3.7
?m -focal-length objective lens whose diameter is 13.0 cm .
Part A
What focal-length eyepiece is needed if your eye can resolve
objects 0.10 mm apart at a distance of 25 cm?
Express your answer using two significant figures. In cm
Part B
What is the resolution limit set by the size of the objective...

Your little sister currently thinks all things insectoid are
really cool, and you want to give her a microscope so she can look
at butterfly wings. However, you are a broke college student, so
you need to build it yourself. You buy two thin lenses: one with a
focal length f = 2.0 cm and the other with f = 1.0 cm.
a. Which lens has a higher power P? You will use this lens as
the objective.
b. You’ve...

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