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.
CBSE to conduct Class 10, 12 practical board exams 2026-27 from November 9
CBSE opens LOC correction facility for Class 10, 12 board exams 2027; make changes by November 7
CBSE Date Sheet 2027 LIVE: Class 10, 12 subject-wise timetable soon; two board exam policy, grading system
Create Your Account
To keep connected with us please login with your personal information by phone
Dont't have an account? Register Now