Tatum,J.B's Geometric optics PDF

By Tatum,J.B

This can be a process notes on optics by means of Dr J.B. Tatum, a retired instructor from the dept of Physics and Astronomy, college of Victoria, Canada. The chapters come in PDF structure. themes mentioned comprise: mirrored image and refraction; lens and reflect calculations; and optical instruments.

summary: this can be a process notes on optics by means of Dr J.B. Tatum, a retired instructor from the dept of Physics and Astronomy, collage of Victoria, Canada. The chapters are available PDF structure. subject matters mentioned contain: mirrored image and refraction; lens and reflect calculations; and optical tools

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This is just f1/f2, which is the angular magnification of the telescope. Thus the diameter of the exit pupil of a pair of 10 % 50 binoculars is 5 mm – just divide the diameter of the object glass by the magnification. 7 The Microscope The front lens of a microscope is generally called the “objective” lens, rather than the “object glass”. In contrast to the telescope, the objective is a small lens with a short focal length. The object is placed just outside the focal point of the objective, and a magnified real inverted primary image is formed quite some distance away.

The reader should try this for other situations (virtual r object, virtual image, concave interface, and so on) to see that you always get the same result. 13 shows a reflecting surface of radius of curvature r submerged in a medium of index n. I show a real object at O, a virtual image at I and the centre of curvature at C. We see that h = α p = β q = γ r . By Euclid, θ = α + γ and 2θ = α + β . ), in spite of the drawing. From these we obtain 1 1 2 = + . 4 On multiplying this by −n, we find that the power is −2n/r.

This may give some comfort to those readers who have been uncomfortable with our assumption that angles are small. I have not been able to draw the lens and mirror drawings in these chapters with realistically small angles, because the drawings would be too cramped. I hope you will understand this shortcoming; you are welcome to try yourself! 4 Depth of focus is not the same thing as depth of field. Suppose we want to photograph an object at a distance p from the camera lens, and that we are prepared to tolerate an out-offocus “image” of diameter up to d, or radius r.

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