1. [11 Points] OSCOLPHYSZMG ZS.4.WA.OZT.TUTORIAL. ASK YOUR TEACHER PRACTICE ANOTHER A customemade compound microscope (see the figure below) with an objective lens with a focal length of 4.00 cm, an eyepiece lens with a focal length of 6.45 cm and a barrel length of 26.0 cm is used to View a 0.100 cm specimen mounted on a microscope slide. Since the microscope is customrmade. it varies slightly from a standard production microscope in that the object distance for the objective is so much larger than the focal length ofthe objective that we cannot set the object distance for the objective equal to the focal length of the objective. However. the image formed by the objective is close enough to the focal point of the eyepiece that we are justied in setting the object distance for the eyepiece equal to the focal length of the eyepiece. Finally, the microscope is being used by a lab technician with a near point of 31.5 cm. (Use the exact values you enter to make later calculations.) Obiective lens Object i l?\" r r r. I: b 5 m z e '1 Final image Determine the following. (a) distance the specimen (object) is mounted from the objective lens (Enter your answer to at least two decimal places.) cm (b) magnification of the objective lens (Include the sign of the value in your answer: Enter your answer to at least two decimal places.) (c) magnication of the eyepiece lens (Include the sign of the value in your answer.) (d) overall magnification for the microscope (Include the sign of the value in your answer.) (e) height of the image formed by the objective (Include the sign of the value in your answer.) cm (f) height of the nal image forrned by the microscope (Include the sign of the value in your answer.) cm (9) absolute value of angle subtended at the technician's eye when she holds the specimen at her near point and views it with her unaided eye rad (h) absolute value of angle subtended at the technician's eye when she views the specimen through the microscope rad Additional Materials [9 Reading '3 Tutorial 3. [0/1 Points] DETAILS PREVIOUS ANSWERS OSCOLPHY52016 26.2.WA.014.TUTORIAL. MY NOTES ASKYOUR TEACHER PRACTICE ANOTHER Two lab partners, Man/ and Paul are both farsighted. Mary has a near point of 65.0 cm from her eyes and Paul has a near point of 126 cm from his eyes. Both students wear glasses that correct their vision to a normal near point of 25.0 cm from their eyes, and both wear glasses 1.80 cm from their eyes. In the process of wrapping up their lab work and leaving for their next class, they get their glasses exchanged (Mary leaves with Paul's glasses and Paul leaves with Mary's glasses). When they get to their next class, nd the following. (a) Determine the closest object that Mary can see clearly (relative to her eyes) while wearing Paul's glasses. x Try splitting the problem into two steps. First, find the refractive power of each pair of glasses and then the closest object that each student can clearly view while wearing the other student's glasses. Think carefully about whether a particular object or image distance should be relative to the glasses or relative to the eyes. Give careful thought to the appropriate algebraic sign (:t) for all object and image distances. m (b) Determine the closest object that Paul can see clearly (relative to his eyes) while wearing Man/'s glasses. _x How can you modify the result used to determine the closest object Mary can see clearly to determine the closest object Paul can see clearly? m Additional Materials III Reading '3 Tutorial 3. [0/1 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYSZO16 26.4.WA.029. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER When you hold an insect at the near point of your eye it subtends an angle of 5.00 X 10'3 rad. Determine the angular size (magnitude only) of the insect when viewed through a microscope that has an angular magnication with a magnitude of 140. -x How is the angular magnification of a microscope related to the angle size of the object with and without optical instrumentation? rad Additional Materials III Reading 4. [l1 Points] DETAILS OSCOLPHY52016 26.5.WA.040.TUTORIAL. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The telescope at a small obsen/atory has objective and eyepiece focal lengths respectively of 17.8 m and 12 cm. If this telescope is used to view a 1320 m diameter lunar crater on the surface of the moon 3.77 X 108 m from the surface of the Earth, determine the following. (a) angular magnification of the telescope H (b) size of he first image m H (c) length of the barrel of the telescope m H (d) angle subtended at the unaided eye by the lunar crater rad H (e) angle subtended at the eye when the lunar crater is viewed through the telescope rad H Additional Materials I: Reading a Tutorial 7. [0.33/1 Points] DETAILS PREVIOUS ANSWERS OSCOLPHY52016 26.5.WA.044. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A small telescope has a concave mirror with a 2.50-m radius of curvature for its objective. Its eyepiece is a 4.20-cm focal length lens. (a) What is the telescope's angular magnification? -x How is the angular magnification of a telescope related to the focal length of the objective and eyepiece lens? (b) What is the angle subtended by a 25,000km diameter sunspot? The average EarthSun distance is 1.496 X 1011 m. 0.000167 g; rad (c) What is the angle of its telescopic image? _x How is the angle of the telescopic image related to the angular magnification and the angle subtended by the object? rad Additional Materials El Reading 8. [05/1 Points] DETAILS PREVIOUS ANSWERS OSCOLPHY$2016 26.5.WA.050. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You wish to purchase a telescope that is easy to transport from one location to another. You finally decide on one with a barrel length of 1.39 m and an angular magnification of 79.3. Determine the following. (a) the focal length of the objective 135 y m (b) the foca length of the eyepiece 0.04 3' How are the focal lengths of the objective and eyepiece related to the length of the barrel for a telescope? m Additional Materials El Reading 9. [0/1 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYSZO16 26.5.WA.054. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Freddie has a small telescope that has a 139-cm focal length objective and an angular magnification of 60. In order to make his sister appear smaller, he turns the telescope around and looks through the objective lens. Determine the angular magnification of his sister when viewed through the "wrong" end of the telescope. _x How is the angular magnification of a telescope related to the focal length of the objective and eyepiece? If you interchange the lenses, what will this do to the angular magnification? Additional Materials L'j Reading