Explain the propogation of a wave through a medium using the analogy of a collection of springs connected to each other.

With propagation of longitudinal waves through a medium,the quantity transmitted is:

How are protoplasm of two adjacent cells connected to each other?

In bakelite, the rings are joined to each other through

What are the uses of putting two lenses in contact with each other ?

Two identical springs, one of spring factor k_1 and other of spring factor k_2 are first connected in parallel and then in , series with same rigid support. Deduce the spring constant, when a body of weight mg is connected to each of combination.

In what ways the directions of the electric and magnetic field vectors representing an electromagnetic waves related to each other?