A plane wave front falls on a convex lens. The emergent wave front:
Although a convex lens is s converging lens, it does not ensure that all emerging wave front would be converging. It depends upon the incident wave front. It only has a converging tendency. There may be cases when a diverging wave front is not converged enough, and the emergent wave front is still diverging.
However a plane wave front would always be converged by a convex lens.
An initially parallel cylindrical beam travels in a medium of refractive index $$\mu(I) =\mu_0 + \mu_2 I$$, where $$\mu_0$$ and $$\mu_2$$ are positive constants and $$I$$ is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius. The initial shape of the wave front of the beam is
What is the shape of the wavefront in each of the following cases: (a) Light diverging from a point source.(b) Light emerging out of a convex lens when a point source is placed at its focus.(c) The portion of the wavefront of light from a distant star intercepted by the Earth.
The phenomena which is not explained by Huygen's construction of the wavefront
which one of the following phenomenon is not explained by Huygen's construction of wavefront
Ray diverging from a point source form a wave front that is
Wave front formed by the collimator of a spectrometer
For the situation shown in the figure below. $$BP - AP = \dfrac {\lambda}{3}$$ and $$D > > d$$. The slits are of equal widths, having intensity $$I_{0}$$. The intensity at $$P$$ would be :