Question

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
lens (that is, by diffraction)? Use *?*=560nm.

Express your answer using two significant figures. In km

Answer #1

a) The Mount Palomar telescope has an objective mirror with a
508 cm diameter. Determine its angular limit of resolution at a
wavelength of 550 nm (in radiants and degrees). (Recall that you
can resolve two objects only if the maxima of their images are
separated by at least the radius of the first dark fringe of each
image’s Airy disk).
b) How far apart must two objects be on the surface of the Moon
if they are to be...

The eyepiece of a compound microscope has a focal length of 2.90
cm , and the objective lens has f = 0.720 cm . An object is placed
0.810 cm from the objective lens. Assume a normal eye and that the
final image is at infinity.
a)Calculate the distance between the lenses when the microscope
is adjusted for a relaxed eye.
Express your answer to two significant figures and include the
appropriate units.
b)Calculate the total magnification.
Express your answer...

A 750 × microscope uses a 0.45-cm-focal-length objective lens.
If the tube length is 17.1 cm , what is the focal length of the
eyepiece? Assume a normal eye and that the final image is at
infinity, fe≪l.
Express your answer to two significant figures and include the
appropriate units.

Your task in physics laboratory is to make a microscope from two
lenses. One lens has a focal length of 3.3 cm , the other 1.5 cm .
You plan to use the more powerful lens as the objective, and you
want the eyepiece to be 15 cm from the objective.
a. For viewing with a relaxed eye, how far should the sample be
from the objective lens?
Express your answer to two significant figures and
include the appropriate units....

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 questions ask for the significant figures to be set to 3
along with the units
1.) An engraver uses a magnifying
glass (f = 9.20 cm) to examine some work, as in the
drawing. The image he sees is located 28.0 cm from his eye, which
is his near point. (a) What
is the distance between the work and the magnifying glass?
(b) What is the angular magnification of the
magnifying glass?
2.) A compound microscope has a barrel...

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.

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.

Two converging lenses with focal lengths of 40 cm and 20 cm are
16 cm apart. A 3.0 cm -tall object is 11 cm in front of the 40 cm
-focal-length lens.
Part A- Calculate the image position. Express your answer using
two significant figures.
Part B Calculate the image height. Express your answer using two
significant figures.

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...

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