List the conditions necessary for sustained interference.

Interference is

Define interference. List the conditions of obtaining sustained interference.

What is germination? List the conditions necessary for germination.

List a few conditions necessary for plant growth.

Conditions necessary for seed germination are

State one condition for obtaining a sustained interference of light.

(a) Why are coherent sources necessary to produce a sustained interference pattern ? (b) In Young's double slit experiment using monochromatic light of wavelength lamda , the intensity of light at a point on the screen where path difference is lamda , is K units. Find out the intensity of light at a point where path difference is lamda//3 .

State two conditions to obtain sustained interference of light. In young's double slit experiment, using light of wavelength 400 nm, interference fringes of width X are obtained. The wavelength of light is increased to 600 nm and the separation between the slits is halved. if one wants the observed fringe width on the screen to be the same in the two cases, find the ratio of the distance between the screen and the plane of the slits in the two arrangements.

List two conditions necessary for the imbibition to take place.

(a) What is total internal reflection ? (b) State two conditions necessary for total internal reflection to occur. (c) draw diagrams to illustrate total internal reflection.