Wave Optics Tes...

The wavefront of a light beam is given by the equation $$x + 2 y + 3 z = c$$ , (where c is arbitrary constant) then what is the angle made by the direction of light with the y-axis?

A light wave has a frequency of $$5\times { 10 }^{ 14 }Hz$$ and waves length of $$4\times { 10 }^{ -7 }m$$ in a medium. The refractive index of the medium is

The intensity of sound reduces by 20 $$  \%  $$ on passing through a glass slab. If sound of intensity 1 is made to cross through two such slabs, then the intensity of emergent sound will be

The figure shows a double slit experiment where $$  P  $$ and $$  Q $$ are the slits. The path lengths $$  P X  $$ and $$  Q X  $$ are $$  n \lambda  $$ and $$ (n+2) \lambda  $$ respectively, where $$  n  $$ is a whole number and $$  \lambda  $$ is the wavelength. Taking the central fringe as zero, what is formed at $$  X $$

Which one of the following phenomena is not explained by Huygens construction of wave front ?

In a young double slit experiment, 12 fringe are observed to be formed in a certain segment of the screen when light of wavelength 600 m is used. If the wavelength of light is changed to 400 nm, number of fringes observed in the same segment of the screen is given by 

While moving from deep water to shallow water.

Light of wavelength 6000 is incident bria single slit. The first minimum of the diffraction pattern is obtained at 4 mm from the centre. The screen is at a distance of 2 m from the slit.

In a YDSE both slits produce equal intensities on the screen. A 100% transparent thin film is placed in front of one of the slits. Now the intensity of the geometrical centre of system on the screen becomes 75% of the previous intensity. The wavelength of the light is 6000A and $${ \mu  }_{ glass }=1.5.$$ The thickness of the film cannot be : 

If a ray of light is incident on dielectric surface such that the reflected ray is maximum polarized , then the angle between incident ray and normal to the surface is