Show ,with the help of diagram,how unpolarised sunnlight gets polarised due to scattering.

Show peristalsis with the help of diagram.

What is an unpolarised ligth ?Explain with the help of a suitable ray diagram,how an unpolarised light can be polarised by reflection from a transparent medium.Write the expression for Brewster angle in terms of the refractive index of the denser medium.

Show with the help of a diagram, how two cells may be connected in parallel.

Two similar bars made from two different materials P and Q are placed one by one in a non-uniform magnetic field. It is observed that bar P tends to move from the weak to the strong field region and d. What is the nature of the magnetic materials for making these two bars? Show with the help of a diagram, the behaviour of the field lines due to an external magneic field near each of these two bars.

Describe with the help of diagram, how compressions and rarefactions are produced in air near a source of sound ?

What is a p-n junction ? Explain with the help of a diagram, how depeletion layer is formed near the junction. Also explain what happens to this layer, when the junction is reversed biased.

What do you understand by the statement 'Light from the sun is unpolarised'? Explain how does sunlight get polarized by the process of scattering.

Show the centrosome cycle with the help of diagrams only.