Chapter 25 Questions Flashcards
A CCD camera is equipped with a lens with constant focal length. As the f-number is decreased, determine whether the following quantities increase, decrease, or remain unchanged: the aperture
increases
A CCD camera is equipped with a lens with constant focal length. As the f-number is decreased, determine whether the following quantities increase, decrease, or remain unchanged: the depth of field
decreases
A CCD camera is equipped with a lens with constant focal length. As the f-number is decreased, determine whether the following quantities increase, decrease, or remain unchanged: the intensity of the light reaching the sensor
increases
A CCD camera is equipped with a lens with constant focal length. As the f-number is decreased, determine whether the following quantities increase, decrease, or remain unchanged: the appropriate exposure time
decreases
For a farsighted person, the _____ is always located farther than ______ from the eye and the corrective lens is ______
near point, 25cm, converging
For a nearsighted person, the _____ is always located closer than ______ from the eye and the corrective lens is ______
far point, infinity, diverging
A patient has a near point of 1.25m, is she nearsighted or farsighted? What is the corrective lens?
farsighted, converging
A lens with a certain power is used as a simple magnifier. If the power of the lens is doubled, does the angular magnification increase or decrease?
increase
Suppose a microscope’s resolution is diffraction limited. Which of the following changes would provide the greatest improvement to its resolution?
observing at a shorter wavelength through a larger aperture
If you increase the aperture diameter of a camera by a factor of three, how is the intensity of the light striking the film affected?
it increases by a factor of nine
