Name/Title
Exercise, SchoolEntry/Object ID
1991.05.03.10aScope and Content
Light blue coloured, legal sized paper.
The Victoria University of Manchester
College of Technology
Easter Terminal Examinations, 1947 Session 1946-1947
Physics
4 Questions
Some handwriting on top half of page
Revers; Blank page
Transcription:
HM S B. 12/4S
UNIVERSITY OF MANCHESTER
(FACULTY OF TECHNOLOGY)
COLLEGE OF TECHNOLOGY
Easter Terminal Examinations, 1947. Session 1946-1947,
PHYSICS. (231).
(Textile Industries - 2nd Year Higher)
Thursday, 20th March, 1947. 1.30 to 3,30 P.M.
Candidates are required to attempt not more than THREE questions.
Questions : Results: 58 (II class)
L 1. Show that - y= acos 2? (t/? -x/?)
represents a progressive Simple Harmonic wave motion.
Hence, If a plane wave is incident on a circular aperture, show how the resultant vibration at a point in front of the wave and on the axis of the aperture may he deduced from a vibration polygon.
What is the area of a Fresnel half period zone for a point
distant d in front of the- plane wave 'front- of light of wavelength ?.
v 2. Describe and account for the diffraotion effects observed. . when a parallel beam of monochromatic light passes (a) over a straight edge, (b) through a narrow rectangular aperture (c) over a narrow wire.
What is the intensity of* light at the geometrical edge of the shadow in (a)?
3. Explain clearly all the advantages of using an oil immersion lens as the first lens of a microscope objective, and show how the image formed by it is free from spherical abberation when the object is correctly situated.
A microscope consists of an objective of focal length 1 cm. and an eyepiece of focal length 6 ems. placed 15 oms o apart. If the final imago is formed 24 cms. in front of the eyepiece, find the position of the object and the magnification produced.
4. Explain what is meant by the indicatrix, making clear what information can be derived from it, and showing how the ray velocity surfaces may be deduced in the case of a positive uniaxial crystal.
A parallel beam of unpolarised light is incident obliquely on the face of a uniaxial crystal. Show In a diagram how refraction of. both ordinary and extraordinary rays takes place (a) if the optic axis is normal to tho surface, (b) if the optic axis is normal to the plane, of incidence .Collection
Textile IndustryCataloged By
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Status By: Cotter, Ellen
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