wave-optics

Related Questions

• Light of wavelength $\lambda$ = 5000 Å falls normally on a narrow slit. A screen placed at a distance of 1 m from the slit and perpendicular to the direction of light. The first minima of the diffraction pattern is situated at 5 mm from the centre of central maximum. The width of the slit is

  ---

• A slit of width a is illuminated by white light. For red light ($\lambda$ = 6500 Å), the first minima is obtained at $ heta = {30^o}$. Then the value of a will be

  ---

• In the experiment of diffraction at a single slit, if the slit width is decreased, the width of the central maximum

  ---

• A light of wavelength 5890 Å falls normally on a thin air film. The minimum thickness of the film such that the film appears dark in reflected light

  ---

• The angle of polarisation for any medium is $60^o$, what will be critical angle for this

  ---