What is interference of light? Write two essential condition for sustained interference pattern to be produced on the screen.

What is total internal reflection of light ? What are the two essential conditions for total internal reflection to take place ?

The contrast in the fringes in any interference pattern depends on

What is the essential condition for addition of two vectors?

State the essential conditions for two light waves to be cohrent.

The two slits in Young's double slit experiment are seprated by a distance of 0.03 cm.When light of wavelength 5,000 overset@A falls on the slits,nd interference pattern is produced on the screen 1.5 m away.Find the distance of 4th bright fringe from the central maximum.

What is the main condition to produce interference of light?