List of top Physics Questions on Interference and Diffraction

The maximum intensity in a Young's double slit experiment is \( I_o \). Distance between the slits (\( d \)) is \( 5\lambda \), where \( \lambda \) is the wavelength of light used. The intensity of the fringe, exactly opposite to one of the slits on the screen, placed at \( D = 10d \) is \dots
In a Young double slit experiment, the wavelength of incident light is \(6000\,\text{\AA}\), the separation between slits \(S_1\) and \(S_2\) is \(5\,\text{cm}\) and the distance between slits plane and screen is \(50\,\text{cm}\), as shown in the figure. If the resultant intensity at \(P\) is equal to the intensity due to individual slits, the path difference between interfering waves is _____ \AA.
In Young's double slit experiment, the fringe width of the interference pattern produced on the screen is $2.4 \mu \text{m}$. If the experiment is carried out in another medium having refractive index 1.2, the fringe width will be _______ $\mu \text{m}$.

In single slit diffraction pattern, the wavelength of light used is \(628\) nm and slit width is \(0.2\) mm. The angular width of central maximum is \(\alpha \times 10^{-2}\) degrees. The value of \(\alpha\) is ____.

In hydrogen type atom, shortest wavelength in Lyman series is given as 91 nm. Then the longest wavelength in Paschen series of this atom shall be
The width of one of the two slits in Young's double-slit experiment is \( d \) while that of the other slit is \( x d \). If the ratio of the maximum to the minimum intensity in the interference pattern on the screen is 9 : 4, then what is the value of \( x \)? (Assume that the field strength varies according to the slit width.)