Q1. Which one of the following materials cannot be used to make a lens?
(a) Water (b) Glass (c) Plastic (d) Clay
Clay cannot be used to make a lens.
(d) is the correct answer.
Board Exam Date 2025 Live: Bihar Class 10, 12 model papers out, time table soon; updates on CBSE, UP
CBSE Class 10 board exams from February 15 to March 18; download date sheet 2025 PDF
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