Wave Optics Tes...

A screen is at a distance of 2 m from a narrow slit illuminated with light of 600 nm.  The first minimum lies 5 mm on either side of the central maximum. The width of slit is. 

In a double-slit experiment, instead of taking slits of equal widths, one slit is made twice as wide as the other. Then, in the interference pattern:

The double slit experiment of young has been shown in the figure: Q is the position of the first bright fringe on the right side and P is the $$11^{th}$$ fringe on the other side as measured from Q. If wavelength of light used is $$6000\overset { \circ  }{ A } $$ $$,{ S }_{ 1 }B$$ will be equal to:

In a Young's double slit experiment the intensity at a point where the path difference is $$\lambda /6 (\lambda $$ being the wavelength of light used) is i. If $$I+o$$ denotes the maximum intensity, $$I/I_o$$ is equal to

Visible light passing through a circular hole from a diffraction disc of radius 0.1 mm on a screen. If X-ray is passed through the same set-up, the radius of the diffraction disc will be : 

Light of wavelength $$\lambda $$ from a point source falls on a small circular obstacle of diameter 'd'. Dark and bright circular ring around a central bright pot are formed on a screen beyond the obstacle is D, then the condition for the formation of ring is : 

Before insertion of plate, mid-point of screen in YDSE (assuming mid point of screen is aligned with the mid point of slits) is a location of

In the interference of waves from two sources of intensities $$I_{0}$$ and $$4I_{0}$$. The intensity at a point where the phase difference is $$\pi$$ is 

A polarizer and an analyzer are arranged with their optic axes parallel to each other Symmetric light first passes through the polarizer and then the analyzer and the intensity of the light emerging is 'I'. If the analyzer is turned through $$30^o$$, the percent changes in the intensity is

An aperture of diameter 1.2 mm has been illuminated by monochromatic light. The diffracted light is observed on a screen. When the screen is gradually displaced towards the aperture, the centre becomes dark for the first time at a distance of 30cm from the aperture. The wavelength of light used is :