Review25 - 0 is the angle subtended by the object when it...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Modified from College Physics , 8 th Ed., Serway and Vuille. For the quizzes and tests, you should know all the concepts and equations in this summary. Section 25.1: The Camera The light-concentrating power of a lens of focal length f and diameter D is determined by the f - number. The smaller the f -number of a lens, the larger the aperture. The smaller the f -number, the larger the depth of field. Section 25.2: The Eye Hyperopia (farsightedness) is a defect of the eye that occurs either when the eyeball is too short or when the ciliary muscle cannot change the shape of the lens enough to form a properly focused image. Myopia (nearsightedness) occurs either when the eye is longer than normal or when the maximum focal length of the lens is insufficient to produce a clearly focused image on the retina. The power of a lens in diopters is the inverse of the focal length in meters. Section 25.3: The Simple Magnifier The angular magnification of a lens is defined as 0 θ = m [25.2] where θ is the angle subtended by an object at the eye with a lens in use and
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 0 is the angle subtended by the object when it is placed at the near point of the eye and no lens is used. When the eye is relaxed, the angular magnification is f m cm 25 = [25.6] Section 25.4: The Compound Microscope The overall magnification of a compound microscope of length L is the product of the magnification produced by the objective, of focal length f o , and the magnification produced by the eyepiece, of focal length f e : = e o f f L M cm 25 [25.7] Section 25.5: The Telescope The angular magnification of a telescope is e o f f m = [25.8] where f o is the focal length of the objective and f e is the focal length of the eyepiece. Section 25.6: Resolution of Single-Slit and Circular Apertures Two images are said to be just resolved when the central maximum of the diffraction pattern for one image falls on the first minimum of the other image....
View Full Document

Page1 / 2

Review25 - 0 is the angle subtended by the object when it...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online