A piece of paper can be burnt using hand lens , how ?
What do you mean by optical instrument? Give the types of optical instruments with examples.
Prove that , magnification m = image distance/ object distance.
Show with suitable ray diagram that magnification is one for convex lens when object is at 2 F.
Define magnification of lens. Also give the formula to calculate it.
What is meant by one dioptre power of lens? or Explain about the term 1dioptre.
What do you mean by power of lens ? or describe power of lens in your own words.
Redraw the given diagram and complete it, write nature of image.
Draw a neat and labeled diagram showing the image formed by concave lens.
What kinds of image are formed by convex lens and concave lens ?
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