What is the relationship between path difference and phase difference ?

Write out relation between path difference and phase difference (/_\phi) .

The relation between path length (/_\l) and phase difference (/_\phi) is given by

What will be the nature of the graph between the current and potential difference ?

What is phase relationship between current and voltage in (i) an inductor,and (ii) a capacitor in a circuit ?

What is the difference between temperature and heat?

Obtain the relationship between DeltaH and DeltaU for gas phase reactions.

What is the difference between space and sky.

What is the difference between lenticels and stomata?

What is the difference between power and work?

What is the difference between a foetus and an embryo?