Chemistry
Chemical Reactions and Equations
10 Topics Acids, Bases and Salt
7 Topics Metals and Non-Metals
16 Topics Biology
Heredity and Evolution
10 Topics Our Environment
7 Topics Physics
Light Reflection and Refraction
17 Topics The Human Eye and Colourful World
15 Topics Electricity
11 Topics Magnetic Effects of Electric Current
10 Topics 
Important Terminologies Related to Spherical Mirrors
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[Spherical mirrors, Concave mirrors, Convex mirrors, Pole, Radius of curvature, Centre of curvature, Focus, Focal point, Focal length, Principal axis]