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Physics: Optics and Physical Quantities

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이 집합의 용어 (15)

  • What do the symbols s and s' represent in optics?
    s is the object distance and s' is the image distance.
  • What do the symbols y and y' represent in optics?
    y is the object height and y' is the image height.
  • What is the symbol and typical unit for focal length?
    Focal length is represented by \(f\) and is often measured in centimeters (cm).
  • What is the symbol and typical unit for radius of curvature?
    Radius of curvature is represented by \(R\) and is often measured in centimeters (cm).
  • What is linear magnification and its symbol?
    Linear magnification is represented by \(m\) and is unitless.
  • Write down the thin lens or mirror equation.
    The thin lens or mirror equation is \(\frac{1}{s} + \frac{1}{s'} = \frac{1}{f}\).
  • Write down the magnification equation relating distances.
    Magnification is given by \(m = -\frac{s'}{s}\).
  • Write down the equation that defines linear magnification using heights.
    Linear magnification is defined as \(m = \frac{y'}{y}\).
  • Write down the equation that defines angular magnification.
    Angular magnification is defined as \(M = \frac{\theta'}{\theta}\).
  • Write down the equation for the focal length of a spherical mirror.
    Focal length is related to radius of curvature by \(f = \frac{R}{2}\).
  • What is the 'far point' in human vision?
    The far point is the farthest point at which the eye can focus clearly; for a healthy human, it is at infinity.
  • What is the 'near point' in human vision?
    The near point is the closest point at which the eye can focus clearly.
  • What is the typical near point distance for a healthy human?
    The typical near point distance is 25 cm.
  • Who needs magnifying glasses: a near-sighted or far-sighted person?
    Far-sighted people need magnifying glasses.

  • Draw a concave mirror with an object infront of the concave mirror.

    \(i)\)