Question

Does a positive s’ value correspond to a real or a virtual image? Does a positive...

Does a positive s’ value correspond to a real or a virtual image? Does a positive s’ value correspond to an image to the left or to the right of the lens?

• Does a negative s’ value correspond to a real or a virtual image? Does a negative s’ value correspond to an image to the left or to the right of the lens?

• Which kind of image (real or virtual) appears to the right of the lens? Which kind of image (real or virtual) appears to the left of the lens?

• Which kind of lens (converging/diverging) creates real images? Which kinds of lenses (converging/diverging) create virtual images?

• Does a positive value for M correspond to an upright or an inverted image? What about a negative M value?

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Answer #1

According to cartesian sign convention- (Remind it )

  • positive value of s' represents the image is real. also to the right of the lens ( if object is left side ).
  • negative value of s' represents the image is virtual , also to the left side (if object is left side )
  • IF object is left side then right side image is real and left side image is virtual .
  • converging lens creates Real and virtual image for real image it is converging lens. diverging lens always creates virtual image.
  • positive value of the magnification m represents the image is upright . and negative value of m represents the image is inverted.
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