Question

Statement I: In YDSE, if separation between the slits is less than wavelength of light, then no interference pattern can be observed.
Statement II: For interference pattern to be observed, light sources have to be coherent.
A. Statement-I is true and Statement-II is true and Statement-II is the correct explanation of Statement-I.
B. Statement-I asnd Statement-II are true but Statement-II is not the correct explanation of Statement-I
C. Statement-I is true, Statement-II is false
D. Statement-I is false, Statement-II is true.

Answer 1

Correct Answer - B
Path difference `Delta x= d sin theta implies Delta x_(max) lt d`, if `d lt lambda` then `Delta x_(max)lt lambda` so maxima can be present and interference pattern cannot be observed. Statement-II is true, but not explaining Statement-I