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Lecture 28

# Lecture 28 - Recap of last lecture na/s nb/s =(nb-na/R m =...

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Recap of last lecture n a /s + n b /s’ = (n b -n a )/R m = y’/y = -n a s’/n b s A pair of spherical surfaces can form concave or convex lenses. Light refracting through these spherical surfaces tend to converge in convex lenses and diverge in concave lenses. For thin lenses 1/s + 1/s’ = 1/f ( where s is the object distance s’ is the image distance and f is the focal length.

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Recap of last lecture
For a 2.0 cm horizontal arrow on the optical axis with midpoint at 75.0 cm from convex lens with f = 30.0 cm, which of these is true about the image of the arrow A. Image points to right and is longer. B. Image points to right and is shorter . C. Image points to left and is longer. D. Image points to left and is shorter. E. None of the above Ray diagram shown in next slide

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A
If F’ and G’ are images of letters F and G for this diverging lens, then A. F’ is left of G’ and F’ is bigger than G’. B. F’ is left of G’ and G’ is bigger than F’. C. F’ is right of G’ and F’ is bigger than G’. D. F’ is right of G’ and G’ is bigger than F’.

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Lecture 28 - Recap of last lecture na/s nb/s =(nb-na/R m =...

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