Wavefront

Define wavefront. Which kind of wavefront is produced by a line source of light? Prove law of refraction on the basis of Huygens’ wave theory.

Why is the contribution of the wavelets lying on the back of the wavefront zero?

Draw the diagrams to show the behaviour of plane wavefronts as they pass through concave mirror.

Draw the diagrams to show the behaviour of plane wavefronts as they pass through a thin convex lens.

Draw the diagrams to show the behaviour of plane wavefronts as they pass through a thin prism.

Sketch the wavefronts corresponding to diverging rays.

Sketch the wavefronts corresponding to converging rays.

What is the geometrical shape of the wavefront for sunlight focussed by a convex lens?

What is the geometrical shape of the wavefront for the portion of wavefront of light from a distant star intercepted by the earth?

What is the geometrical shape of the wavefront for light emerging out of a convex lens when a point-source is placed at the focus of the lens?

What is the geometrical shape of the wavefront for light diverging from a point-source?

Define wavefront. How is it related to the direction of the corresponding rays?

Out of speed, frequency, wavelength and amplitude, which parameter(s) does (do) not change on refraction?
 

A ray of monochromatic light travelling in vacuum with speed $c$, wavelength $\lambda$ and frequency $f$, enters into a medium of refractive index $1.5$. What will be its new speed, wavelength and frequency?

What is the shape of wavefront for a beam of parallel waves? What for originating from a point source?

With what type of source of light are cylindrical wavefronts associated?

Which of the following does not support the wave nature of light?