Science board paper for 2020 examination had a question that was not in the sylabus. Set 2 q24 of section b the students were supposed to draw a bifocal lens ray diagram and this has not been included in the ncert text book. How is something supposed to be drawn on the paper if it is not taught to us. Many have just drawn spectacles with two lenses on it and some have drawn diagrams for concave and convex lens.
Regards
Nandan mehta
Class 10
Gopi birla memorial school Was this information helpful? | 
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