1. On one of the shelves in your physics lab is displayed an antique telescope. A sign underneath the instrument says that the telescope has a magnification of 23.0 and consists of two converging lenses, the objective and the eyepiece, fixed at either end of a tube 81.0cm long. Assuming that this telescope would allow an observer to view a lunar crater in focus with a completely relaxed eye, what is the focal length fe of the eyepiece?
Note that to view the crater with a completely relaxed eye, the eyepiece must form its image at infinity and that images formed by telescopes of this nature are always inverted.
fe = ?cm
2. What is the focal length of the objective lens? (fo = ?cm)


1. On one of the shelves in your physics lab is displayed an antique telescope. A sign underneath the instrument says t...
On one of the shelves in your physics lab is displayed an antique telescope. A sign underneath the instrument says that the telescope has a magnification of 20 and consists of two converging lenses, the objective and the eyepiece, fixed at either end of a tube 60.0 long. Assuming that this telescope would allow an observer to view a lunar crater in focus with a completely relaxed eye, what is the focal length of the eyepiece? Note that to view...
The telescope at a small observatory has objective and eyepiece focal lengths respectively of 19.8 m and 12 cm. If this telescope is used to view a 1480 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 -165 Your answer is correct. (b) size of the first image -7.8e-5m Your answer is correct. (c) length of the barrel of the telescope...
The microscope available in your biology lab has a converging lens (the eyepiece) with a focal length of 2.50 cm mounted on one end of a tube of adjustable length. At the other end is another converging lens (the objective) that has a focal length of 1.00 cm. When you place the sample to be examined at a distance of 1.30 cm from the objective, at what length will you need to adjust the tube of the microscope in order...
The Galilean Telescope. The following figure is a diagram of a Galilean telescope, or opera glass, with both the object and its final image at infinity. The image I serves as a virtual object for the eyepiece. The final image is virtual and erect (Figure 1) Part A Find the angular magnification M. Part B A Galilean telescope is constructed from two lenses. the 95.0-cm lens being used as the objective. What focal length should the eyepiece have...
In a two-lens system, the image produced by one lens acts as the object for the next lens. This simple principle finds applications in many optical instruments, including some of common use such as the microscope and the telescope. Part A The microscope available in your biology lab has a converging lens (the eyepiece) with a focal length of 2.50 cm mounted on one end of a tube of adjustable length. At the other end is another converging lens (the...
9. A simple telescope can be constructed from two convex lenses. Consider a telescope that uses a 500 mm lens (focal length of 500 mm) for the objective lens and a 150 mm lens for the eye piece. 1. How far apart must the lenses be placed to view an object that is 100 m away (from the objective lens) and appears to be 20 cm in front of the eyepiece lens? 2. What magnification does the telescope produce for...
(10 points: for full credit all work must be turned in) A microscope has a converging lens (the eyepiece) with a focal length of f; = 2.07 cm mounted on one end of a tube of adjustable length. At the other end is another converging lens (the objective) that has a focal length of f2. = 15.01 cm . When you place a small flea you want to examine at a distance of sy = 3.67 cm from the objective,...
Part A The overall magnification of an astronomical telescope is desired to be 21 x. If an objective of 88-cm focal length is used, what must be the focal length of the eyepiece? Express your answer to two significant figures and include the appropriate units. fe= Value Units Submit Request Answer Part B What is the overall length of the telescope when adjusted for use by the relaxed eye? Express your answer to two significant figures and include the appropriate...
a microscope has a converging lens (the eyepiece) with
a focal length of f1=1.73cm mounted on one end of a tube of
adjustable length. at the other end is another converging lens (the
objective) that has a focal length of f2=29.04 cm. when you place a
small flea you want to examine at a distance of s1=3.36 cm from the
objective . find the overall length of the microscope needed to
view the sample (the flea) in focus with a...
a microscope with converging lens (eyepiece) has a
focal lenght of f1= 1.42cm mounted on one end of a tube of
adjustable lenght. the other end is another converging lens (the
objective)that has a focal lenght of f2=14.65 cm. when you place
the flea at a distance of s1=3.20cm from the objective, find the
overall lenght (cm) of the microscope needed to view the sample (a
flea) in focus with a relaxed eye.
hint(a normal relaxed eye will expect to...