Optics 6 Question 41
43. In Young’s double-slit experiment, the two slits act as coherent sources of equal amplitude and of wavelength . In another experiment with the same set-up the two slits are sources of equal amplitude and wavelength , but are incoherent. The ratio of the intensity of light at the mid-point of the screen in the first case to that in the second case is ……
True / False
Show Answer
Solution:
- In case of YDSE, at mid-point intensity will be
In the second case when sources are incoherent, the intensity will be
Therefore, the desired ratio is
Here,