Problem solving tips
2 min read

Ray Optics And Optical Instruments

- Want to score better marks in exams? Have a look at some problem solving tips.
Tip 1
In problems involving a combination of lenses, always concentrate on one lens at a time.
  • For convenience, mark the crucial points such as f, 2f, R on the principal axis.
  • Start from the object, the direction of rays going towards the lens is taken to be positive.
  • We repeat the above procedure until no further images can be formed.
NOTE: The same tips are helpful while deriving the lens maker's formula as well as understanding the optical instruments like compound microscope and refracting telescopes.
Let us solve some sample questions: