List of top Physics Questions on Wave Optics asked in BITSAT

Calculate the de Broglie wavelength of an electron moving with a given velocity.

There are two sources kept at distances 2λ apart. A large screen is perpendicular to the line joining the sources. Number of maxima on the screen in this case (λ= wavelength of light) is

In the Young’s double-slit experiment, the intensity of light at a point on the screen where the path difference is λ/K (where λ is the wavelength of light used). The intensity at a point where the path difference is λ/4 will be:

In a YDSE, the light of wavelength λ = 5000AA is used, which emerges in phase from two slits at distance d = 3×10⁻7m apart. A transparent sheet of thickness t = 1.5×10⁻7m and refractive index μ = 1.17 is placed over one of the slits. What is the new angular position of the central maxima of the interference pattern from the centre of the screen? Find the value of y.

The figure shows the interference pattern obtained in a double slit experiment using light of wavelength 600nm. Fingers marked 1, 2, 3, 4 and 5 are shown. The third order bright fringe is:

In Young’s double slit experiment, λ = 500nm, d = 1mm, D = 1m. Minimum distance from the central maximum for which intensity is half of the maximum intensity is:

In a YDSE, light of wavelength \(\lambda = 5000\,\text{\AA}\) is used, which emerges in phase from two slits at a distance \(d = 3\times10^{-7}\,\text{m}\) apart. A transparent sheet of thickness \(t = 1.5\times10^{-7}\,\text{m}\) and refractive index \(\mu = 1.17\) is placed over one of the slits. What is the angular position of the central maxima of the interference pattern from the centre of the screen? Find the value of \(y\).

Calculate the wavelength of light used in an interference experiment from the following data: Fringe width \(=0.03\) cm. Distance between the slits and eyepiece through which interference pattern is observed is 1 m. Distance between the images of the two virtual sources when a convex lens of focal length 16 cm is used at a distance of 80 cm from the eyepiece is 0.8 cm.

In a Young's double slit experiment the angular width of a fringe formed on a distant screen is \( 1^\circ \). The wavelength of the light used is \( 6280 \, \text{Å} \). What is the distance between the two coherent sources?

If the distance between first maxima and fifth minima of a double slit pattern is 7 mm and the slits are separated by 0.15 mm with the screen 50 cm away, the wavelength of light used is: