Laws of Simple Pendulums (c) Period of pendulum is proportional to square root of length

This video describe the fact that time period is proportional to square root of its length. The linked video are given below For time period independent of Amplitude. Click on    • Laws of simple pendulum (a), Time period i...   For time period independent of mass....... Click on    • Laws of Simple Pendulum (b) Time period is...   For measuring diameter using Vernier calipers click on    • Measurements with Vernier Calipers in Urdu...