(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`.

(a) Why are coherent sources necessary to produce a sustained interference pattern ? (b) In Young's double slit experiment using mono-chromatic light of wavelength lambda the intensity of light at a point on the screen where where path difference is lambda, is K units. Find out the intensity of light at a point where path difference is (2lambda)/(3)

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. What is the intensity of light at a point where path difference is (lamda)/3 ?

In Young's double-slit experiment using monochromatic light of wavelength lambda , the intensity of light at a point on the screen where path difference is lambda , is K units. What is the intensity of light at a point where path difference is lambda//3 ?

In Young's double-slit experiment using monochromatic light of wavelength lambda , the intensity of light at a point on the screen where path difference is lambda is K units. What is the intensity of light at a point where path difference is lambda/3 ?

In Young's double slit experiment using monochromatic light of wavelength lambda , the intensity of light at a point on the screen where path diff. is lambda is K units. Find the intensity of light at a point where path difference is lambda//3 .

In Young's double-slit experiment using monochromatic light of wavelength lambda, the intensity of light at a point on the screen where path difference is lambda , is K units. What is the intensity of lgight at a point where path difference is lambda/3 .