3. A compound microscope consists of two lenses (the objective and the eyepiece) enclosed in a darkened tube. The objective of the microscope has a diameter of 0.90 cm. The slide containing the specimen is fixed at 2.5 cm from the objective. a) Explain briefly (in two or three sentences) how the electron microscope provides better resolution of fine specimen structures than the optical (light-illuminated) microscope. [3] b) If the slide is illuminated primarily by 580-nm yellow light, find the size of the smallest structures on the slide that can be distinguished. [2] c) If the object is illuminated by electrons having a kinetic energy of 2.0 eV, find: i. the momentum of these electrons, [1] ii. the wavelength of these electrons, [1] iii. the size of the smallest structures on the specimen that can be distinguished under this illumination (assuming the same size aperture, and the same distance between the object and the aperture as above). [1] You may consult the textbook to find the values of any relevant physical quantities.
3. A compound microscope consists of two lenses (the objective and the eyepiece) enclosed in a darkened tube. The objective of the microscope has a diameter of 0.90 cm. The slide containing the specimen is fixed at 2.5 cm from the objective. a) Explain briefly (in two or three sentences) how the electron microscope provides better resolution of fine specimen structures than the optical (light-illuminated) microscope. [3] b) If the slide is illuminated primarily by 580-nm yellow light, find the size of the smallest structures on the slide that can be distinguished. [2] c) If the object is illuminated by electrons having a kinetic energy of 2.0 eV, find: i. the momentum of these electrons, [1] ii. the wavelength of these electrons, [1] iii. the size of the smallest structures on the specimen that can be distinguished under this illumination (assuming the same size aperture, and the same distance between the object and the aperture as above). [1] You may consult the textbook to find the values of any relevant physical quantities.
University Physics Volume 3
17th Edition
ISBN:9781938168185
Author:William Moebs, Jeff Sanny
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Chapter2: Geometric Optics And Image Formation
Section: Chapter Questions
Problem 68P: Suppose a certain person’s visual acuity is such that he can see objects clearly that form an image...
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![3. A compound microscope consists of two lenses (the objective and the eyepiece) enclosed
in a darkened tube. The objective of the microscope has a diameter of 0.90 cm.
The slide containing the specimen is fixed at 2.5 cm from the objective.
a) Explain briefly (in two or three sentences) how the electron microscope provides
better resolution of fine specimen structures than the optical (light-illuminated)
microscope. [3]
b) If the slide is illuminated primarily by 580-nm yellow light, find the size
of the smallest structures on the slide that can be distinguished. [2]
c) If the object is illuminated by electrons having a kinetic energy of 2.0 eV, find:
i. the momentum of these electrons, [1]
ii. the wavelength of these electrons, [1]
iii. the size of the smallest structures on the specimen that can be distinguished
under this illumination (assuming the same size aperture, and the same
distance between the object and the aperture as above). [1]
You may consult the textbook to find the values of any relevant physical quantities.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F43352019-f8b0-4456-9b0d-8df4fdc3f26c%2F3b7aaacc-976a-4fdc-9b36-e5c81b4cc513%2Fmc1oxt2_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3. A compound microscope consists of two lenses (the objective and the eyepiece) enclosed
in a darkened tube. The objective of the microscope has a diameter of 0.90 cm.
The slide containing the specimen is fixed at 2.5 cm from the objective.
a) Explain briefly (in two or three sentences) how the electron microscope provides
better resolution of fine specimen structures than the optical (light-illuminated)
microscope. [3]
b) If the slide is illuminated primarily by 580-nm yellow light, find the size
of the smallest structures on the slide that can be distinguished. [2]
c) If the object is illuminated by electrons having a kinetic energy of 2.0 eV, find:
i. the momentum of these electrons, [1]
ii. the wavelength of these electrons, [1]
iii. the size of the smallest structures on the specimen that can be distinguished
under this illumination (assuming the same size aperture, and the same
distance between the object and the aperture as above). [1]
You may consult the textbook to find the values of any relevant physical quantities.
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