types of solid (part-2)
16:24
types of solid (part-1)
11:53
technique of calcules of variation (part-2 )
13:31
crystal systems (part-1)
11:07
Techniques of calcules of variations
10:50
Bravais lattice
10:16
polarisation of light
7:40
technique of calculus of variation (part-3)
9:05