The interfering fringes forward by a thin oil film on water are seen in yellow light of sodium lamp. We find the fringes
Important Questions on Wave Optics and Interference
On a hot summer night, the refractive index of air is the smallest near the ground and increases with a height from the ground. When a light beam is directed horizontally, the Huygens' principle leads us to conclude that as it travels, the light beam,
Figure shows plane waves refracted from air to water using Huygen's principle and are lengths on the diagram. The refractive index of air with respect to water is in the ratio:
Statement (S): Using Huygen's eye-piece measurements can be taken but are not correct.
Reason (R): The cross wires, scale and final image are not magnified proportionately because the image of the objects is magnified by two lenses, whereas the cross wire scale is magnified by one lens only.
Identify the correct one
Spherical wavefronts shown in figure, strike a plane mirror. Reflected wavefronts will be as shown in
The phase of the light wave at c, d, e and f are respectively. It is given that , then
Figure, shows wave fronts in still water, moving in the direction of the arrow towards the interface PQ between a shallow region and a deep (denser) region. Which of the lines shown may represent one of the wave fronts in the deep region?
A monochromatic plane wave of speed c and wavelength is diffracted at a small aperture. The diagram illustrates successive wavefronts (vibrating in the same phase). After what time will some portion of the wavefront reach ?
